Password Protected Page error


My password protected page isn’t working anymore. (password: PIPsblade23!)

The website is translated with Linguana, so maybe that has something to do with it?
Error message:

Forbidden (403)

CSRF verification failed. Request aborted.

You are seeing this message because this site requires a CSRF cookie when submitting forms. This cookie is required for security reasons, to ensure that your browser is not being hijacked by third parties.

If you have configured your browser to disable cookies, please re-enable them, at least for this site, or for “same-origin” requests.

Please help!
Best regards,

Here is my site Read-Only: LINK
(how to share your site Read-Only link)