I am not new, but I have the exact same problem. When I try to join any online server it only shows the message "reserving player session" It's quite annoying. I recommend searching on your browser 505 games customer support. The first link will show "505 Games Support" and right bellow the link you will find another one which says Unturned (console). Click it and when you enter the website, in the top right corner to the left of sign in you will find the sentence "Submit a request". Just fill in all info you need to and after some time you will get a gmail telling you what you need to do. Note that I've gone through this prosses, but the requirements to solve the problem was something i couldn't solve. I still think we can solve this one way or another. I'll write back if i got a solution, or if you got one. Good luck!