HTTP Error: 500 (Internal Server Error) when pushing

Hi, I posted this in Atlassian Support as well, but it's not really clear to me which area is the appropriate place to post this, so I apologize if this is the wrong place. I am able to find other posts about this same issue here, but it always results in someone at bitbucket fixing the problem on their end so I'm not really sure how to fix it.

When pushing my commits to my repo, I get an error. Here is the exact error: "HTTP Error: 500 (Internal Server Error)". I am using TortoiseHG.

I am able to push to other repositories on bitbucket, so it can't be that bitbucket is down. Most threads I can find about the problem just show someone from Bitbucket solving the problem on their end. Is there a way for me to solve the problem?

More background: this is a repository that I have been pushing to regularly for a bit now. Recently I installed HG-Git for a separate project. I attached the extension in TortoiseHG correctly, then decided to use SourceTree instead for that project. I came back to this project and HG-Git was causing problems. I turned off the HG-Git extension in TortoiseHG settings and uninstalled HG-Git. And now instead of HG-Git errors, it's giving me the error written above. It seems unlikely that SourceTree has anything to do with the problem but HG-Git and SourceTree are the only things I can think of that are different since this started happening.

I also updated to the latest version of TortoiseHG, but that didn't help.