Since a few days ago I can no longer install any plugins.
I constantly get a white screen showing an error when accessing my admin panel after a plugin:
“Fatal error: class ‘Helper_Data’ not found in domainfolder/app/mage.php on line 546”
At first I thought it was that particular module, so tried another and I\\\’m continuously having the same issue.
I haven’t touched and of the core files, php etc. only the css files so I don’t think it’s something I’ve messed up…