On Windows, Godot prints errors like that to the console window. I can view the console window if I launch a command line and run the game from there
$ ./turbofat-win-v0.7000.exe Godot Engine v3.5.2.stable.official.170ba337a - https://godotengine.org OpenGL ES 3.0 Renderer: NVIDIA GeForce GTX 970/PCIe/SSE2 Async. shader compilation: OFF WARNING: Unrecognized save data version: '512b' at: call (modules/gdscript/gdscript_functions.cpp:789) WARNING: Unrecognized save data version: '512b' at: call (modules/gdscript/gdscript_functions.cpp:789) WARNING: Unrecognized save data version: '512b' at: call (modules/gdscript/gdscript_functions.cpp:789) WARNING: ObjectDB instances leaked at exit (run with --verbose for details). at: cleanup (core/object.cpp:2070) ERROR: Resources still in use at exit (run with --verbose for details). at: clear (core/resource.cpp:417)Does that work on Linux too?