I can install bed visualizer, but nothing else. Updating my pip from v20 to v21 also breaks my server and doesn't allow me to even try to install any more plugins.
What did you already try to solve it?
Updating my pip, installing using URL and command line in SSH
Have you tried running in safe mode?
Did running in safe mode solve the problem?
Additional information about your setup
Ender 3 Pro Fresh installation of Octoprint
From URL Octoprint Plugin
Could not parse output from pip, see plugin_pluginmanager_console.log for generated output
ERROR: Failed building wheel for yarl
Successfully built aiohttp
Failed to build multidict yarl
ERROR: Could not build wheels for multidict, yarl which use PEP 517 and cannot be installed directly