Whenever I type space the .notdef rectangle shows in Glyphs 2 Mini

Hi. I’m new to Glyphs, I just got the Mini 2 version. Whenever I type space the .notdef rectangle shows. It works normally in the preview inside the app, but when I try to use the font outside (let’s say in Adobe Illustrator), this is what I get.
I tried reseting the font cache by restarting my mac in safe mode (twice), it didn’t help.

Thanks

do you have a “space” glyph in your font?

Yes, with the right unicode corresponding to it

How are you testing the exported font? In what application?

I has been solved, thank you