If you can access git from the Terminal, the Plugin Manager should be able to work, too.
Can you access the GitHub website from the browser?
How did you install vanilla originally? You just need to install it again. And make sure you have 3.11 and the latest version of pyobj installed (e.g. use the version from python.org).
Ok, I’ll update my python to 3.11.
I installed Vanilla two years ago from the plugin manager. Since I have moved from the UK to China, the plug-in manager never works. Currently, I install all my plug-ins via GitHub.
I found the Vanilla GitHub page that said I can use pip to install it.
Maybe I can try to install these two from Github and pip?