can not launch a server

when I launch the server I start with fps between 1 and 30, if the fps is not going up to 60 then I see the next screen "connecting" but as soon as I have 60fps I ever see the screen with "connection to klei failed" after a while.

Sometimes I can start the game but it needs 40-50 trys.

also I startet DST as administrator without Firewall and Avast, nothing changed

I do have the problem when connecting to/launching a server but way less than upon logging into dst, I have to restatrt the game at the very least 2 times, usually around 4 to 6. (tried closing the message and press the "Play!" button again while logging in, it's not working).

My Wifi is better than ever, during the 2k17 forge I had some minor Wifi problems that caused me some preoblems sometimes, a little while later I got it fixed and this whole year (including forge) it worked awesome, suddenly that problem occurred and I only have it with dst, tried turning off all of my client mods, no change.

a screenshot showcasing the problem is below, Klei, please give us a clue, because this message isn't going anywhere and handeling 20 of those everyday is a little too much for me..

*please read my comment above* replying to this post, a little change to is that I cannot connect now, it's not working.. always connection to Klei failed and my connection is damn good, I didn't have that before and my connection was the same but suddenly it just started poping forcing me to restart the game for 5-6 times and now after 10 tries and another and another... it's not connecting, dst is the only game/site/etc that I have this problem with and it's so frustrating
please give me an advice, help... anything, the game is literally unplayable...