Upgrading from 5.5.2.1 to 5.6.0

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Getting the following error message and don't see anyone else with the same issue on the forum

Fatal error: Class 'PageTypePermissionKey' not found in /home/mysite/public_html/conc/updates/concrete5.6.3.3/concrete/core/models/permission/key.php on line 110

 
goodnightfirefly replied on at Permalink Reply
goodnightfirefly
5.5.2.1 to 5.6.3.3 is too big of a jump I think.

If you are updating through the Dashboard update page, it might have asked which version to download, like:

5.6.0.2
5.6.3.2
5.6.3.3


You should choose the first option, and then move on to the next one, repeating until you get to the latest version.
mamadele replied on at Permalink Reply
I got the same error when I went from 5.5.2.1 to 5.6.0...