This issue requires deeper investigation, could you please provide us with SubGit logs from the repository in question? They reside at path REPO/subgit/logs, we mainly interested in daemon and pre- and post-receive hooks logs.
I don’t have that log anymore. I think it may have been a coincidence. I originally ran into this problem: https://issues.tmatesoft.com/issue/SGT-1226 and then tried to rebuild.
I think the issue arises from trying to run subgit install repo.git after error without the --rebuild flag. It happened again after exiting an install with Ctrl-C was hanging, and then I had to force kill everything.
I agree that could be the reason, an interrupted install/import indeed may lead to issues like this sometimes. It’s hard to tell for sure without logs what exactly happened there, though, but the rebuild (or rebuild from a revision) should resolve this issue, so if you did run the rebuild, the issue should not be present anymore.