Cannot login into League of Legends!

Hello, a couple days ago I moved to a new city with a new internet connection and since then the launcher is unable to connect to the Servers. I tried almost everything to make it work again but none of it actually helped. Firewall, IPv4/IPv6 protocol enabled/disabled, launcher repair etc. I am quite new here so I hope some of you who had a similar issues could help me solve my problem.
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