I just bought java and I can Only join cracked minecraft servers

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We're tracking this issue in MC-207896, so this ticket is being resolved and linked as a duplicate.

That ticket has already been resolved as invalid. Please take a look at the parent ticket (MC-207896) and see if an explanation is provided there in the description of the ticket or in the comments for why this issue is invalid.

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I had similar issues and while debugging I noticed these two issues MC-255735 and WEB-6094, so it may be related.