I did something incredibly stupid this morning. I have quite a few page types that I customized by adding a couple of block. Since I don't need the addons anymore, I uninstalled and deleted the addons before I removed the blocks on the page types. Now I get the message:

Fatal error: Call to a member function getBlockTypeHandle() on a non-object in /var/www/vhosts/my_url.com/httpdocs/updates/concrete5.6.3.3/concrete/core/libraries/block_view_template.php on line 41

Is there a way I can recover those pages?