I tried to install fof/moderator-notes via Extension-Manager as below, but I get the error: Something went wrong reload the page.
Then the whole app is down if I try to reload it: This page isn’t working

I need to reistall Flarum from scratch to start again. Any idea what's wrong? Thanks

https://flarum.org/extension/fof/moderator-notes

Flarum latest: 1.8.0

    alex32 The troubleshooting guide can help you identify the problem, see https://flarum.org/troubleshoot

    Reinstalling from scratch if you know which extension is the problem isn't necessary, uninstall moderator notes using

    composer remove fof/moderator-notes

    Or edit the database table settings where key = extensions_enabled by removing the entry that reads "fof-moderator-notes", make sure there aren't duplicate , listed next to each other.

      Thanks, I figured out.
      I found that all extensions are crashing Flarum and I've started installing them via composer.
      Problem solved.

      There must be a bug with Extension-Mgr