I think this is called the [glow=pink2,300]Browser Integrity Check[/glow], where the weird activity of any bad IP TOR as example that is trying to access */admin.php is checked, or sometimes some usual activity of bots or spammers, so PM them about this problem, or host the code in an external host and copy Link or screenshot.

https://developers.cloudflare.com/waf/tools/browser-integrity-check/

This description is more accurate, as other than the CAPTCHA problem, which can be bypassed using code, I have not had any problems with Tor.