The ubcpi repository in the edx organization was a fork of the original repository at GitHub - ubc/ubcpi: Peer Instruction XBlock that had to be made for deadline-driven reasons during a previous major upgrade project. We archived the fork and moved it to edx-unsupported because we were able to go back to using an official release of the upstream repository. There are more details in BOM-1849 and the other tickets linked from it. But in short, you should just be able to install the package from ubcpi-xblock · PyPI and you’ll get a newer version with somewhat updated UI.