Unicode checker not starting

Hi, I’m getting an error when I want to evoke UnicodeChecker from Glyphs. I can’t seem to find a solution online. Maybe someone has an idea that might be helpful(?).

Do you have Unicode Checker installed and you have opened it manually at least once?

Hi Georg, yes I have it installed and opened at least once. I’ve double checked it. Still I get the error. Even after a restart of Glyphs. Running Catalina 10.15.7. UniCode V 1.24

I bought a new computer which seems to help.