Failed to connect (I do not know what to do)

Hi, I have a problem when I want to enter a teamspeak server, I always get the error “failed to connect”, I have this problem for some time and I do not know how I could solve it, I really need a solution.!

I left a screenshot with my attempts to connect to 2 different servers but in vain
Screenshot (120)|690x388

A post was merged into an existing topic: You can’t connect to a server?