upgrade from 7.1.0-2383 CE to 7.1.0-2383 EE.
1. 2 node cluster with 7.1.0-2383 CE
2. install 7.1.0-2383 EE on 3rd node
3. Add 3rd node to CE cluster – fails with error
"Attention: Join completion call failed. Failed to start ns_server cluster processes back. Logs might have more details."
Also the UI page of the EE node goes inaccessible.