I’m having trouble accessing a specific ts server.
I can access others normally but this one I can’t.
I’ve tried to do everything to solve it, even formatting my computer, but it keeps giving the error “Failed to connect to the server”, does anyone know how to solve it?
Can you please post a Client Log? 
I took a closer look at the server on your screenshot. This is a TeaSpeak server, which is not supported by TeamSpeak.
The server you are trying to connect to is not an official TeamSpeak server. We, the community and TeamSpeak staff, will not help you as long as you are trying to connect to an illegal hosted server.
Please use an official TeamSpeak Server.
Thank you.
