Connection error, from a server fully operational, joinable from my PC

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I can join this server with my PC: 5.39.101.250:10055 But on my macbook I have "connection error" I tried uninstalling TS3 and deleting all the files related to it in the Library/cache, Library/preference etc. After reinstalling it's still not working. I don't know what to do. Can you... Connection error, from a server fully operational, joinable from my PC