Plugin broke my comment section

Hey,
after not getting comments for weeks, today someone wrote me via mail that my “post comment” button is not working. And indeed, it does nothing when clicked, but only if your plugin is active. I use the plugin without the checkbox, just to put a text over the button, maybe it still checks if the box is ticked or not.

Also after deactivating the plugin, my default “save my details for later” checkbox is gone and doesn’t come back. I didn’t even tick “Disable WordPress’ default Cookies Consent checkbox”

Please help fix this mess.

The page I need help with: [log in to see the link]