HACC - Home Assistant Command Center

trying to uninstall won’t work from Hassio add-on page. Logs show:

19-09-18 08:00:09 INFO (SyncWorker_2) [hassio.docker.interface] Remove image qjake/hacc-hassio-armv7 with latest and 
19-09-18 08:00:09 WARNING (SyncWorker_2) [hassio.docker.interface] Can't remove image qjake/hacc-hassio-armv7: 400 Client Error: Bad Request ("invalid reference format")

anything we can do about this, Id really like to take it out of the system