mixed mode assembly (still) not working on win32 build

Steps to Reproduce

1. Download one of the hybrid build from https://sourceforge.net/projects/hp-pxl-jetready/files/Microsoft%20Font%20Validator/old/win32.hybrid/
2. run

"c:/Program Files/Mono/bin/mono.exe" --mixed-mode bin/FontValidator.exe -file c:/Windows/Fonts/times.ttf +raster-tests -report-stdout

3. See result below:

Current Behavior

WARNING: The runtime version supported by this application is unavailable.
Using default runtime: v4.0.30319
c:/Windows/Fonts/times.ttf (file 1 of 1)
return type 0x1b unknown
* Assertion: should not be reached at ..\mono\metadata\marshal-ilgen.c:5997


abnormal program termination

Expected Behavior

c:/Windows/Fonts/times.ttf (file 1 of 1)
... a lot of information
Reports are ready!

On which platforms did you notice this

[ ] macOS [ ] Linux [*] Windows

Version Used:

"c:/Program Files/Mono/bin/mono.exe" --version
Mono JIT compiler version 5.14.0 (Visual Studio built mono)
Copyright (C) 2002-2014 Novell, Inc, Xamarin Inc and Contributors. www.mono-project.com
	TLS:           normal
	SIGSEGV:       normal
	Notification:  Thread + polling
	Architecture:  x86
	Disabled:      none
	Misc:          softdebug 
	Interpreter:   yes
	LLVM:          supported, not enabled.
	GC:            sgen (concurrent by default)

Stacktrace

return type 0x1b unknown
* Assertion: should not be reached at ..\mono\metadata\marshal-ilgen.c:5997


abnormal program termination