Could you describe what the benefit of this PR is? What is your motivation?

I can't open my world 1.16.3 in mcedit2 and mcedit1 i rinitialised my computer after i can't open any world was created in 1.15 and + idk for 1.14 i can open 1.8 save

An error occurred while opening C:\Users\user\AppData\Roaming.minecraft\saves\tr bedrock
'NoneType' object is not iterable

Traceback (most recent call last):
File "mcedit2\editorapp.py", line 790, in loadFile (self is a MCEditApp)
File "mcedit2\editorsession.py", line 419, in init (self is a EditorSession)
File "mcedit2\editorsession.py", line 724, in setConfiguredBlocks (self is a EditorSession)
File "mcedit2\editorsession.py", line 728, in reloadModels (self is a EditorSession)
File "src\mcedit2\rendering\blockmodels.pyx", line 236, in mcedit2.rendering.blockmodels.BlockModels.init
File "src\mcedit2\rendering\blockmodels.pyx", line 278, in mcedit2.rendering.blockmodels.BlockModels.loadModelParts
TypeError: 'NoneType' object is not iterable

Maybe they thought they wouldn't come back, so the project died