This is LiteSpeed with their reCaptcha check.
Why do I see it that way?
When you call up the page for the first time from an IP in a browser, you see the bot check window – but only once and it was gone very quickly. It no longer appears on subsequent visits. If I access the page from a server via curl or wget, it does not appear. So I had the problem that I could not see the source code of this page for analysis.
The Facebook debugger shows me what you meant: https://developers.facebook.com/tools/debug/?q=https%3A%2F%2Fbdservicerules.info%2F – but I can’t see the source code here either.
So I used Google Rich Snippet Tool: https://search.google.com/test/rich-results/result – you have to switch from mobile to desktop, as the connection is completely rejected on mobile. But then I see a result including a screenshot of the bot verification from reCaptcha. In the source code, I also see a class which for me is an indication of Litespeed:
<form id="lsrecaptcha-form" method="POST" action="/.lsrecap/recaptcha?">
If you search for “lsrecaptchs-form
”, you will find many posts on the net that refer to LiteSpeed.
How do you use LiteSpeed? Is it part of the hosting? If so, the hoster must clarify this. If it is a plugin, then deactivate it completely.
In any case, it has nothing to do with WordPress, as it is an upstream page. WordPress cannot even intervene in any way here.