[Bug] Could not save userspace file: ['splitkb/aurora/sofle_v2/rev1', '0xErnie'] is not valid under any of the given schemas

Describe the Bug

Following README.md in qmk_userspace creating of a new keymap in my userspace failed with an arbitrary error.

qmk new-keymap -kb splitkb/aurora/sofle_v2/rev1

Ψ Generating a new keymap


Name Your Keymap
Used for maintainer, copyright, etc

Your GitHub Username?  [Redacted] 0xErnie
Ψ Created a new keymap called 0xErnie in: /home/redacted/repos/qmk_userspace/keyboards/splitkb/aurora/sofle_v2/rev1/keymaps/0xErnie.
Ψ Compile a firmware with your new keymap by typing: qmk compile -kb splitkb/aurora/sofle_v2/rev1 -km 0xErnie.
☒ Could not save userspace file: ['splitkb/aurora/sofle_v2/rev1', '0xErnie'] is not valid under any of the given schemas

Failed validating 'oneOf' in schema['properties']['build_targets']['items']:
    {'oneOf': [{'$ref': '#/keyboard_keymap_tuple'},
               {'$ref': '#/json_file_path'}]}

On instance['build_targets'][0]:
    ['splitkb/aurora/sofle_v2/rev1', '0xErnie']

Keyboard Used

splitkb/aurora/sofle_v2/rev1

Link to product page (if applicable)

No response

Operating System

WSL

qmk doctor Output

Ψ QMK Doctor is checking your environment.
Ψ CLI version: 1.1.5
Ψ QMK home: /home/kiwicola/qmk_firmware
Ψ Detected Linux (WSL, Ubuntu 22.04.3 LTS).
Ψ Testing userspace candidate: /home/kiwicola/repos/qmk_userspace -- Valid `qmk.json`
Ψ QMK userspace: /home/kiwicola/repos/qmk_userspace
Ψ Userspace enabled: True
Ψ Git branch: master
Ψ Repo version: 0.25.10
Ψ - Latest master: 2024-07-06 18:21:11 +1000 (4fbb395602) -- `ano`: fix layout name (#24067)
Ψ - Latest upstream/master: 2024-07-07 01:58:04 +0200 (67d512e639) -- Fix enter for two ANSI layouts on the TKD Cycle7 (#24070)
Ψ - Latest upstream/develop: None
Ψ - Common ancestor with upstream/master: 2024-07-06 18:21:11 +1000 (4fbb395602) -- `ano`: fix layout name (#24067)
Ψ - Common ancestor with upstream/develop: None
Ψ All dependencies are installed.
Ψ Found arm-none-eabi-gcc version 10.3.1
Ψ Found avr-gcc version 5.4.0
Ψ Found avrdude version 6.3-20171130
Ψ Found dfu-programmer version 0.6.1
Ψ Found dfu-util version 0.9
Ψ Submodules are up to date.
Ψ Submodule status:
Ψ - lib/chibios: 2024-02-17 19:20:06 +0000 --  (be44b3305)
Ψ - lib/chibios-contrib: 2024-04-03 20:39:24 +0800 --  (77cb0a4f)
Ψ - lib/googletest: 2021-06-11 06:37:43 -0700 --  (e2239ee6)
Ψ - lib/lufa: 2022-08-26 12:09:55 +1000 --  (549b97320)
Ψ - lib/vusb: 2022-06-13 09:18:17 +1000 --  (819dbc1)
Ψ - lib/printf: 2022-06-29 23:59:58 +0300 --  (c2e3b4e)
Ψ - lib/pico-sdk: 2023-02-12 20:19:37 +0100 --  (a3398d8)
Ψ - lib/lvgl: 2022-04-11 04:44:53 -0600 --  (e19410f8)
Ψ QMK is ready to go

Is AutoHotKey / Karabiner installed

• AutoHotKey (Windows)
• Karabiner (macOS)

Other keyboard-related software installed

No response

Additional Context

No response