First, what is your firmware version?

Second, I know you have tried a lot. But I need some details so that I can tell which step you have issues.

Some key points:

  1. Disable vpn on the router. Must
  2. Disable adguard home on the router if you have. Must
  3. Disable dns rebind protection and encrypted dns settings on the route. Must. Pls do this before connecting as repeater.
  4. Disable vpn on your pc. Must
  5. Disable encrypted dns on your pc. For example if you set up 8.8.8.8 in your windows as DNS, it will automatically use encrypted dns. Must
  6. Use browser, connect the router to the hotel wifi. Must get an IP address. Pls send screenshot.
  7. Now the portal should pop up. But sometimes you need to access http://neverssl.com to get it pop up.

The above steps does not need mac clone, which is a different process. Please don’t mix.