Fatal error after update

i deleted /xxxxl/wp-content/mu-plugins/PluginOrganizerMU.class.php and all is correct.

Nothing was changed in the mu plugin and it doesn’t check any capabilities. If you put the mu plugin back do you still get the error?

What version are you updating from?

I don′t try it. I update from last version to the latest version. I don′t know which was the problem, but at this moment all is OK.

I only made the update and i didn′t make any change.

So you have the plugin running again?

Yes!