Hey CJ,
Long time :)
Two things you can do here:
1. Whether the BP service is running on that runtime resource
2. If that's not the case, try this little trick I came saved from a fellow community user a while ago - Try setting the resource to “retired” in „System Manager“ > „Resources“. - starting the startup script results now fairly with the message: Listener failed : Unable to register with the database - Cannot register resource PC xxxx because it has been retired. Now activate the resource again in System Manager and restart the startup script. Afterwards the Scheduler will again be able to connect to the resource PC.
Hope this helps.
Regards
Harpreet