Need help finding the source of a wierd error when launching Unity

Unity Engine
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When I open Unity, I get the following error without any extra context or pointers to show what generated the error.

“Failed to start primary listening socket at (0.0.0.0:55504-55512).”

Unity primary listening socket error
Unity primary listening socket error482×113 5.78 KB

This error appears even when starting a brand new project. I tested on Unity 2022.3.52f1 and Unity 2022.3.7f1.

Any help on finding out what could be causing this would be greatly appreciated. It is bugging me like crazy!

3 Likes
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Did you ever happen to solve this? I got this on a freshly installed Unity 6000.0.29 as well. No idea why.

1 Like
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Having the same issue! Did you find a solution?