Hello,
We’ve fixed this issue in the dev version:
https://github.com/CleanTalk/wordpress-antispam/releases/download/dev-version/cleantalk-spam-protect.zip
1. Go to WordPress Administrator Panel —> Plugins.
2. Find the plugin “Anti-Spam by CleanTalk” —> Deactivate.
3. After the automatic page refreshing find the plugin again “Anti-Spam by CleanTalk” —> Delete. Confirm “Yes, delete these files”.
4. Download the dev version of the plugin archive from the link.
5. Go to Plugins —> Add New —> Upload Plugin.
6. Choose the downloaded archive and press “Install Now”.
7. After the installation, activate the plugin, make sure that the access key matches the key from your CleanTalk Control Panel.