Apr 14, 2019 2:34 pm
Ok. I think your website is infected. Or some security solution works incorrect on hosting service.
Apr 14, 2019 2:35 pm
Infected? With what?
Apr 16, 2019 1:45 pm
Check this topic and then run your URL check at:
https://www.ssllabs.com/ssltest/index.html
And let us know ....
Apr 16, 2019 1:47 pm
Also have you tried with one browser or a few ? Could be a local (your pc) issue ? Some addon on the browser ?
Apr 16, 2019 1:51 pm
Google " The requested URL was rejected. If you think this is an error, please contact the webmaster.
Your support ID is: "
and try each suggestion. Definitely not wpForo related.