Try to validate delivery server in mailwizz and send another confirmation email because this was validated and link is disabled and that is the reason why you receive this 404 not found error.chmod -R 777 /www/wwwroot/mailwizz.xxx.com/apps/common/runtime/mutex
After I changed the permissions on the server, I was able to receive the verification email, but when I clicked the email link, the following error message popped up: