Update screen: Page just turns blank after pressing next

After going to “update wizard” and then pressing “next” the page just turns blank.
I can not see any errors in the log file -

Anyone got an idea about what can be wrong?

When checking in firefox. I see this problem

Stilarket [URL]/suitecrm/themes/Suite7/css/colourSelector.php was not loaded, at the MIME type, “text/html”, are not “text/css”.

Runing the command

chown -R apache:apache /var/www/html/suitecrm/*

did the trick!

However, after applying the update, and pressing next - I am just displayed with a “SERVER ERROR” message
and i am no longer able to access SuiteCRM