Nathan KinkeadMax, thanks for offering your proposed solution, and thanks for adding more context to your situation, Ed.
I mentioned this in your other forum post as well, but a trailing slash at the end of a URL doesn’t matter. It works the same with or without it. I’ve been a professional web developer for 20+ years so I should know.
Even if the missing trailing slash was going to cause a problem, it would have stopped the repo from installing. But, as Ed mentioned, that’s not where the issue is happening, the repo installs just fine, the Indigo add-on installs just fine, and the Github Browser add-on installs just fine.
But, the issue that Ed mentioned is with the functionality within the Github Browser add-on when you go to search for a username. The URL of the file source that was used to install the repo which was used to install the add-on should have no impact on this piece of functionality of this add-on.
Instead, I think the act of simply uninstalling and reinstalling was the real fix in your case.