deploy on Render, cant enter others' profile page, and cant refresh the page, they all will show NOT FOUND

[newcodecareer]

deploy on Render, cant enter others' profile page, and cant refresh the page, they all will show NOT FOUND.
I just follow the video at the end of EDROH's next video-- MERN React Admin Dashboard, I deployed this one to render after deploying the server, and u will get a URL like this "https://[your service name].onrender.com", and then changed the localhost:3001 to this URL, it deployed success, but I get the issue as the title said.

[newcodecareer]

After changing the "http://localhost:3001" URL to Render URL, the warning "Mixed Content:"--the yellow part of the screenshot is gone. But still, can't go to the profile from the friend component part.

[newcodecareer]

found the issue, when I comment out "navigate(0)" in the "friend component", it works.

[newcodecareer]

Still can't refresh the web, anybody knows why?

[Peyush3]

Still can't refresh the web, anybody knows why?

Have you found out the issue now?
If yes, please tell