Glyphs 3 keep crashing when making layered color font

Hello, I have been trying to make a layered color font, well it works well until i close glyphs app, it will never be able to open the font file again…the app will just keep crashing. This issue only happens when it’s a color font file, the glyphs app also crashes very often when I’m working on a color font file in general… any idea how to fix this? Thanks , and have a good holiday!

Sorry about that. Can you send me the .glyphs file?

Hi George
Thanks for your reply.
Here is the glyphs file download link:

one more thing to add: seems even on the file preview window, it failed to load the preview