An error occurred in the plugin that could not be installed

I’ve tried to install some plugins but they can’t appear in the glyphs app…

What version of Python do you use?
What happens if you click ignore and restart Glyphs? Do you get an error message?

phyton 3.9.1
nothing happens and nothing changes…

there is a message like this

Uninstall and reinstall Python and vanilla in Plugin Manager.

And read this: