Fatal Error after trying to upgrade Concrete 5.5 to 5.6 site

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I received the following error after clicking the upgrade button on my concrete 5 site. Any suggestions, whole site not responding. I did a full site backup and a Concrete backup before starting, but would prefer to fix it as I need the new version for a component.

Fatal error: Call to undefined method AddBlockBlockTypePermissionAccess::isPermissionKeyInUse() in /home7/bereanb5/public_html/updates/concrete5.6.1.2_updater/concrete/helpers/concrete/upgrade/version_560.php on line 284

 
webBerean replied on at Permalink Best Answer Reply
Figured it out. Had to contact my hosting provide, roll back to a backup of the site from last night, upgrade to version 5.6.0 first manually by copying it to the updates folder and running it. I was then able to upgrade to the latest version.

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