The problem is so serious that our users can't access sites like teachable at all. It is widespread, and you can see many browser developers complaining about CloudFlare on the Internet.
Thanks to our R&D team, who were the first in the world to solve this problem. All you need to do is update WhaleDown to the latest version and launch Google Chrome.
For operation methods, please refer to the document Components/Browser.
Due to some technical reasons, WhaleDown Browser is still unable to bypass CloudFlare verification. Be sure to use Google Chrome instead.