[Need Help][PC] Failed To Connect To Matchmaking

I have been playing KI since the start of S2 and now in S3. I switched to PC and have had a load of problems. Most I have fixed but the biggest being the I cannot connect to Exhibition nor Ranked. However I can play with my friends in a lobby and in Exhibition. If you have had the same problem and fixed it I would appreciate the help. I would like to get back to my qualifiers (again).

Hello, try this it works for me: