Hi, ich wollte eine pn verschicken, als fehlermeldung bekomme ich das:

Access Denied - Sucuri Website Firewall
If you are the site owner (or you manage this site), please whitelist your IP or if you think this block is an error please open a support ticket and make sure to include the block details (displayed in the box below), so we can assist you in troubleshooting the issue.

Block details:
Your IP: 78.42.xxx.xxx
URL: forum.cstalking.tv/private.php?do=insertpm&pmid=
Your Browser: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.87 Safari/537.36
Block reason: Your request was not authorized due to its content (HTML code not allowed).
Time: 2019-11-05 05:32:29
Server ID: 13010

In der PN war kein html code drin, nur reinen text.

Was habe ich falsch gemacht?