[BUG] [Snap] Problems with GTK/libadwaita themes

$ LIBGL_DEBUG=verbose snap run fastboot-assistant &

[2025-06-20 10:09:49] [INFO]: Logging started.
[2025-06-20 10:09:49] [INFO]: Log closed.
[2025-06-20 10:09:49] [INFO]: start fastboot-assistant

/snap/fastboot-assistant/6/gnome-platform/usr/lib/x86_64-linux-gnu/gtk-4.0/4.0.0/media/libmedia-gstreamer.so: undefined symbol: gdk_cicp_params_set_matrix_coefficients
Failed to load module: /snap/fastboot-assistant/6/gnome-platform/usr/lib/x86_64-linux-gnu/gtk-4.0/4.0.0/media/libmedia-gstreamer.so
[2025-06-20 10:09:49] [INFO]: activate_fastboot_assistant
[2025-06-20 10:09:49] [INFO]: Check for auto theme file.
[2025-06-20 10:09:49] [INFO]: Check for adw_css file
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.169: Theme parser error: defaults-dark-yaru-default.css:1:1-6: Unknown name of pseudo-class
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.169: Theme parser error: defaults-dark-yaru-default.css:11:38-39: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.169: Theme parser error: defaults-dark-yaru-default.css:14:28-34: Expected a valid color.
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.169: Theme parser error: defaults-dark-yaru-default.css:15:33-39: Expected a valid color.
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.169: Theme parser error: defaults-dark-yaru-default.css:16:29-35: Expected a valid color.
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.169: Theme parser error: defaults-dark-yaru-default.css:17:29-35: Expected a valid color.
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.169: Theme parser error: defaults-dark-yaru-default.css:18:27-33: Expected a valid color.
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.169: Theme parser error: defaults-dark-yaru-default.css:27:43-44: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.169: Theme parser error: defaults-dark-yaru-default.css:28:50-51: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.169: Theme parser error: defaults-dark-yaru-default.css:32:41-42: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.169: Theme parser error: defaults-dark-yaru-default.css:33:42-43: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.169: Theme parser error: defaults-dark-yaru-default.css:37:51-52: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.169: Theme parser error: defaults-dark-yaru-default.css:38:52-53: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.169: Theme parser error: defaults-dark-yaru-default.css:39:37-40: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.169: Theme parser error: defaults-dark-yaru-default.css:41:38-39: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.169: Theme parser error: defaults-dark-yaru-default.css:46:41-42: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.170: Theme parser error: defaults-dark-yaru-default.css:49:33-34: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.170: Theme parser error: defaults-dark-yaru-default.css:50:45-46: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.170: Theme parser error: defaults-dark-yaru-default.css:51:1-6: Unknown name of pseudo-class
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.170: Theme parser error: defaults-dark-yaru-default.css:53:1-6: Unknown name of pseudo-class
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.170: Theme parser error: defaults-dark-yaru-default.css:103:1-6: Unknown name of pseudo-class
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.170: Theme parser error: defaults-dark-yaru-default.css:114:1-6: Unknown name of pseudo-class
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.170: Theme parser error: defaults-dark-yaru-default.css:119:1-6: Unknown name of pseudo-class
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.170: Theme parser error: defaults-dark-yaru-default.css:122:39-49: Expected a valid color.
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.170: Theme parser error: defaults-dark-yaru-default.css:123:1-6: Unknown name of pseudo-class
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.170: Theme parser error: base-yaru.css:1:1-6: Unknown name of pseudo-class
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.170: Theme parser error: base-yaru.css:48:1-6: Unknown name of pseudo-class
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.170: Theme parser error: base-yaru.css:50:1-6: Unknown name of pseudo-class
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.170: Theme parser error: base-yaru.css:52:1-6: Unknown name of pseudo-class
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.170: Theme parser error: base-yaru.css:54:1-6: Unknown name of pseudo-class
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.170: Theme parser error: base-yaru.css:56:22-26: Expected a valid color.
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.170: Theme parser error: base-yaru.css:56:64-68: Expected a valid color.
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.170: Theme parser error: base-yaru.css:58:14-18: Expected a valid color.
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.170: Theme parser error: base-yaru.css:66:29-32: Percentages are not allowed here
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.170: Theme parser error: base-yaru.css:68:363-380: No property named "--accent-bg-color"
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.170: Theme parser error: base-yaru.css:68:406-423: No property named "--accent-fg-color"
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.170: Theme parser error: base-yaru.css:68:443-468: No property named "--scrollbar-outline-color"
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.170: Theme parser error: base-yaru.css:68:488-512: No property named "--standalone-color-oklab"
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.170: Theme parser error: base-yaru.css:68:532-546: No property named "--accent-color"
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.171: Theme parser error: base-yaru.css:68:614-633: No property named "--destructive-color"
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.171: Theme parser error: base-yaru.css:68:706-721: No property named "--success-color"
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.171: Theme parser error: base-yaru.css:68:790-805: No property named "--warning-color"
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.171: Theme parser error: base-yaru.css:68:874-887: No property named "--error-color"
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.171: Theme parser error: base-yaru.css:68:969-972: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.171: Theme parser error: base-yaru.css:68:1021-1022: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.171: Theme parser error: base-yaru.css:71:31-41: Expected a valid color.
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.171: Theme parser error: base-yaru.css:73:44-54: Expected a valid color.
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.171: Theme parser error: base-yaru.css:75:76-80: Expected a valid color.
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.171: Theme parser error: base-yaru.css:75:128-132: Junk at end of value for box-shadow
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.171: Theme parser error: base-yaru.css:75:165-169: Expected a valid color.
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.171: Theme parser error: base-yaru.css:80:47-48: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.171: Theme parser error: base-yaru.css:80:68-69: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.171: Theme parser error: base-yaru.css:80:90-91: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.171: Theme parser error: base-yaru.css:80:113-114: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.171: Theme parser error: base-yaru.css:83:55-56: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.171: Theme parser error: base-yaru.css:83:77-78: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.171: Theme parser error: base-yaru.css:83:98-99: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.171: Theme parser error: base-yaru.css:83:120-121: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.171: Theme parser error: base-yaru.css:83:143-144: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.171: Theme parser error: base-yaru.css:85:86-90: Expected a valid color.
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.171: Theme parser error: base-yaru.css:86:57-61: Expected a valid color.
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.171: Theme parser error: base-yaru.css:88:231-235: Expected a valid color.
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.171: Theme parser error: base-yaru.css:126:48-52: Expected a number
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.171: Theme parser error: base-yaru.css:128:56-57: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.171: Theme parser error: base-yaru.css:128:87-88: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.171: Theme parser error: base-yaru.css:128:118-119: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.172: Theme parser error: base-yaru.css:128:143-144: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.172: Theme parser error: base-yaru.css:130:73-83: Expected a valid color.
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.172: Theme parser error: base-yaru.css:132:66-69: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.172: Theme parser error: base-yaru.css:132:100-103: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.172: Theme parser error: base-yaru.css:132:133-136: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.172: Theme parser error: base-yaru.css:138:76-86: Expected a valid color.
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.172: Theme parser error: base-yaru.css:140:59-69: Expected a valid color.
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.172: Theme parser error: base-yaru.css:140:59-69: Junk at end of value for background
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.172: Theme parser error: base-yaru.css:142:119-129: Expected a valid color.
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.172: Theme parser error: base-yaru.css:142:119-129: Junk at end of value for background
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.172: Theme parser error: base-yaru.css:148:78-81: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.172: Theme parser error: base-yaru.css:148:111-114: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.172: Theme parser error: base-yaru.css:150:78-81: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.172: Theme parser error: base-yaru.css:150:111-114: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.172: Theme parser error: base-yaru.css:152:89-92: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.172: Theme parser error: base-yaru.css:154:57-67: Junk at end of value for box-shadow
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.172: Theme parser error: base-yaru.css:170:821-831: Expected a valid color.
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.173: Theme parser error: base-yaru.css:172:6291-6301: Expected a valid color.
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.173: Theme parser error: base-yaru.css:174:6574-6584: Expected a valid color.
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.173: Theme parser error: base-yaru.css:176:13863-13873: Expected a valid color.
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.173: Theme parser error: base-yaru.css:178:6672-6682: Expected a valid color.
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.174: Theme parser error: base-yaru.css:180:6624-6634: Expected a valid color.
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.174: Theme parser error: base-yaru.css:182:13933-13943: Expected a valid color.
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.174: Theme parser error: base-yaru.css:184:1077-1081: Expected a number
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.175: Theme parser error: base-yaru.css:204:5464-5468: Expected a valid color.
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.175: Theme parser error: base-yaru.css:204:5516-5520: Junk at end of value for box-shadow
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.175: Theme parser error: base-yaru.css:206:89-92: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.175: Theme parser error: base-yaru.css:206:127-128: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.175: Theme parser error: base-yaru.css:210:94-104: Expected a valid color.
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.175: Theme parser error: base-yaru.css:212:83-93: Expected a valid color.
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.175: Theme parser error: base-yaru.css:214:162-172: Expected a valid color.
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.175: Theme parser error: base-yaru.css:216:73-83: Expected a valid color.
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.175: Theme parser error: base-yaru.css:218:85-95: Expected a valid color.
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.175: Theme parser error: base-yaru.css:220:180-190: Expected a valid color.
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.175: Theme parser error: base-yaru.css:226:1607-1617: Expected a valid color.
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.175: Theme parser error: base-yaru.css:228:1392-1402: Expected a valid color.
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.175: Theme parser error: base-yaru.css:230:3004-3005: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.175: Theme parser error: base-yaru.css:232:1430-1431: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.176: Theme parser error: base-yaru.css:234:1526-1527: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.176: Theme parser error: base-yaru.css:236:3260-3261: Unexpected data at end of RGB() argument
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.176: Theme parser error: base-yaru.css:238:693-710: No property named "--accent-bg-color"
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.176: Theme parser error: base-yaru.css:238:741-758: No property named "--accent-fg-color"
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.176: Theme parser error: base-yaru.css:238:789-803: No property named "--accent-color"
(fastboot-assistant:27285): Gtk-WARNING **: 10:09:49.176: Theme parser error: base-yaru.css:238:838-842: Expected a valid color.

 _Originally posted by @igorpupkinable in [#98](https://github.com/NachtsternBuild/fastboot-assistant/issues/98#issuecomment-2990117249)_