Glyphs crash when exporting UFO files from .glyphs file

I have some issues when I exporting ufo file from an MM glyphs file. I tried with another .glyphs file and I don’t have this issue. I think I have a problem with this .glyphs file but I don’t now why ?
Does anyone have any ideas? Thanks

Can you send me the file?

Yes of course !

Do you have receive it ?

Thanks for the file. I fixed it.

The file has to many alignment zones and the error message crashed.

I erased all the alignment zones and regenerated them. Now it works! Thanks Georg and happy to e-meet you !