Is this the only way to get help from CleanTalk?
I used the plugin UpdraftPlus – Backup/Restore to back up my blog and then used the plugin WP Downgrade to go back to a previous version. That cleared up the problems for me.
After updating to 5.1, when I try to go to my blog I now get: The requested URL was rejected. If you think this is an error, please contact the webmaster.
Your support ID is: 11081098616106838277