Access key validating: Unknown access key.

Hello @kamerhuren,

Please, deactivate the CleanTalk plugin with the Complete Deactivation option:
WordPress Admin Page —> Settings —> Security by CleanTalk —> General Settings —> enable “Complete Deactivation” —> Save Changes.
Plugins —> Installed plugins —> Security by CleanTalk —> Deactivate and Activate

This option will reset all plugin settings. Don’t forget to insert your access key.