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Yup, at the moment of me trying to join the server it was up, my friend was playing on it, i had the same issue with the 2018 csgo, but fixed it with 'no prime fix', but as i read, 2020 doesn't require prime, i still have free prime, but as far as i know it doesn't matter really, atleast in 2020...

Nothing much to add besides this screenshot, tried various servers, my friend could join one of them without any problems, but it doesn't work for me for some reason.