Character with original .xml not working at all...

[PSI3x]

For a specification of what I mean: A character whose sprite was an edit of GF's .fla worked well, but a character who used an .fla I made from scratch I kept getting a very unspecific error. Does anyone with actual knowledge with the engine's workings know what I'm doing wrong?

This displays every time I open the character .json+.xml in the animation editor. I can send the files for testing, if you need them.

[KoloInDaCrib]

May you please send the .png and the .xml files? I took a gander at the code and line 503 is this:

which basically means that, if you character crashes the editor, there was a problem with generating frames from the .xml file

[PSI3x]

Interesting, thank you. Here are all the files currently relating to the character sprites in question:
XML+PNG+JSON.zip

[KoloInDaCrib]

The problem lies in this line in the .json file

it should be

"assetPath": "characters/senpai_playable",

(basically just replace the dash with an underscore, since your character's files are named senpai_playable and not senpai-playable)

[PSI3x]

I see, my bad for messing up so badly. Thank you very much for the help.