Custom game maps not downloading correctly

So every time I connect to a custom game in wc3:r the downloading map progress bar stays at 0%, then it joins the lobby then disconnects me as soon as I join sending me back the the custom map game list.

The problem is that when I’m joining the custom games it doesn’t actually download the map and it skips the download process then kicks me when I join. Is this a known bug?

The only fix I found for this was to reinstall wc3:r, so I know it has to do with some wc3:r folder/files. Even when I reinstall it works for a while then does the same thing again.

I did see on the sticky post to try to delete the maps folder in the user documents folder, but I tried that and still the same problem.

I can’t play custom games because of this bug.

What can I do to fix this?

[Edit] I see an error in the OsNetlog.txt in the warcraft C:\Users\User\Documents\Warcraft III\Logs folder says this:
t[0x0000000000000b14] se[87] we[87] CreateIoCompletionPort failed 2.

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May need to ensure the game is allowed through the fire wall and/or ports used by the game are open.

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