Official status
Check whether Tabletop Simulator is under maintenance or having a wider outage.

Connection errors and timeouts in Tabletop Simulator aren't always the server's fault. Sometimes the server is up, but your ISP's route to it is dropping packets. In that case, going through a different path with GamesTC can fix it.
GamesTC Network
7 associated city(ies):
Another way to the server
When your ISP's route fails, the connection goes through GamesTC nodes to the game's data center.
GamesTC Detailed Smart Route
Connection quick guide
Check the official Tabletop Simulator status page or social channels first. If the server is down, no VPN can fix it. If it works for other people and only you can't connect, your ISP's route may be losing packets, and an alternate path usually solves it.
Check whether Tabletop Simulator is under maintenance or having a wider outage.
If others can connect and you can't, the problem may be your route.
Connect through GamesTC and try again over a different path to the server.
Game traffic avoids the problem segment of your ISP's route.
Add the launcher to the route when the game requires it.
Compare connecting with and without GamesTC to see if the route was the issue.