Hello Jorge, can you describe what you were doing when the issue happened?
Does this error happen every time?
Could you maybe provide steps to reproduce the error?

hi im getting the same problem, it seems random when its happening, i have it had crash during edit mode and during animation with a mesh

HI adekto, the log you posted displays no error unfortunately. I suspect it has something to do with the number of vertices, and if you make some vertices overlap others - especially if this happens in setup pose. could you send us the problematic file at contact@esotericsoftware.com if you manage to reproduce the problem with a defined sequence of actions?

im sorry im not any help, what i found it happens on any file eventually, even on spineboy so i don't think its the project file.
im constantly saving now and wen it crashes and i try to reproduce the last action i did it wont crash