A restore should be done to the same version that created the backup. If you need to install an older version of Central to match the version that created the backup please see this thread:
ODK Central database migration incomplete - #2 by Matthew_White also mentions a Cannot find module
error, and the suggestion is to make sure the submodule are updated. You might also run the following and post the output here to help troubleshoot:
git rev-parse HEAD
git submodule
But again, I suspect your issue may be (at least partly) because you are trying to restore to a different version than the version the created the backup.