And then a window with public urls shows ups but it does not work, it gets not found error, and all other urls on the same server do not work as well it says not found.
Also accessing the server does not produce any log in the windows with public url.
On the other hands, private share did not work for a while and now continued to work.
Is there a chance you reached the limits, and then upgraded to paid plan? We found that the limits are not properly reset when that occurs, which we are working to fix. We are also going to work to change the message to indicate a limit issue rather than a Not Found error, which is not very informative.
This command will not work properly... maybe you could share the exact commands you're using and their output?
Typically you would do something like zrok share public localhost:8888, which would dynamically allocate a URL for your share, and then would send traffic to that URL to localhost:8888.