when I export my font it automatically closed and unable to export it. It quit also when I open an otf file.
I also tried to redownload the glyph if it doesn’t work.
what Glyphs version are you using?
I think I am using the latest version
Please send several crash reports (from the dialog that comes up when you reopen the app).
It looks like you’re running on macOS 10.15.5. You might need to run the latest cutting edge version, though @GeorgSeifert can verify that. And it still would be good to send the crash reports after starting up, again, as Georg mentioned.