I've had to split my message as the message checker doesn't like me and/or code boxes ...
If I enable logs in the extension I get:
26/06/2019, 13:31:01 : Connecting using websocket
26/06/2019, 13:31:01 : Opening connection on ws://127.0.0.1:10391
26/06/2019, 13:31:01 : Connection opened
26/06/2019, 13:31:01 : Connection established on port 10391
26/06/2019, 13:31:02 : Message parsed successfully
26/06/2019, 13:31:02 : Greetings from Enpass
26/06/2019, 13:31:02 : Self Initiating srp.
26/06/2019, 13:31:02 : Authentication required
26/06/2019, 13:31:02 : Termnating srp initialization process.
26/06/2019, 13:31:27 : Message parsed successfully
26/06/2019, 13:31:27 : App Different user.
26/06/2019, 13:31:27 : Closing connection
26/06/2019, 13:31:27 : Disconnecting Manually.
26/06/2019, 13:31:27 : Bug with 10391
26/06/2019, 13:31:27 : Connecting using websocket
26/06/2019, 13:31:27 : Opening connection on ws://127.0.0.1:10392
26/06/2019, 13:31:28 : Opening connection on ws://127.0.0.1:10393
26/06/2019, 13:31:29 : Error with connection after other user reported.
26/06/2019, 13:31:29 : Got Error
26/06/2019, 13:31:29 : Opening connection on ws://127.0.0.1:10394
26/06/2019, 13:31:30 : Opening connection on ws://127.0.0.1:10395
Enpass is definitely listening on port 10391:
C:\Users\uizmw>netstat -ano | findstr 10391
TCP 127.0.0.1:10391 0.0.0.0:0 LISTENING 12008
C:\Users\uizmw>echo off & (for /f "tokens=5" %a in ('netstat -aon ^| findstr 10391') do tasklist /NH /FI "PID eq %a") & echo on
Enpass.exe 12008 Console 1 87,848K