Flows stopped due to missing node types. BLE Beacon Scanner

If you have installed also the dependencies there is a node problem, it is not compatible with the NR version you are running. Better raise an issue at github and hope the author will fix it

Did you install the dependencies as noted at the bottom of the readme? The npm install there must be run from the .node-red directory?

If not then do that. Then re-install the node from the command line, in the .node-red directory do
npm install node-red-contrib-blebeacon-scanner
and if it doesn't work then post the install log here.

If you have already installed the dependencies then run the install as above and post the results here.