Latest update problem (no replies)

Hello there,

I tried updating my piwik to the latest version but during the update I got "Problem loading this page" and now I'm not able to access my piwik. When I try to open it, the URL changes to this -> mydomain/index.php?module=CoreUpdater&action= and again the "Problem loading this page" message. Is there a way to fix this without removing the database and the whole installation and installing it from the beginning?

Thanks in advance!