What more can you tell us about the problem? These might help:
I see that you noted Cam v4. What other Wyze Cam models are you using?
What browser(s) are you using?
What add-ons or extensions are you using in the browser(s)?
How far do you get into the login process, and what specific error messages are you seeing?
I’d start by answering those questions and by making sure you’re using a supported browser (and maybe even reading the rest of the article in that link). This recent topic might also be helpful: