I've installed Joomla 4 to test with, and I'm getting this error on every attempt to login to the admin:

Invalid controller class: display

I've re-installed and am using the latest alpha release.

Any ideas of how to fix?

  • Please report any J4 bugs on the Joomla Issue Tracker: github.com/joomla/joomla-cms/issues
    – Lodder
    Oct 25 '19 at 22:52
  • This question may be Too Broad because we don't have any details regarding your environment.
    – mickmackusa
    Oct 26 '19 at 0:04
  • Are you installing on local or on a server somewhere?
    – Eoin
    Oct 26 '19 at 15:06
  • Check that libraries/autoload_psr4.php file exists.
    – Sharky
    Oct 28 '19 at 17:21

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