Import Git Repo Not Working

I'm in the process of importing a bunch of git repositories from Assembla into BitBucket. It was working fine until about an hour ago, at which point the Import tool stopped working.

I would select "Git Repo" for both the Old and New Repositories. Under just Old Repository, I provide the Assembla git URL, username, and password. Under just New Repository, I set the repo name, language, and set the owner to a team.

Upon hitting "Import Repository," I get the following error message:

The source and destination scm must match.

I can't get past this error message to import the repositories.