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CAS Logon hanging pop-up


I’m using CAS only login for my rocketchat which is working properly but it has an issue: after pressing Login with Cas, a new pop-up with the rocketchat.domain/_cas/BJZ6ef4aSDdeEf5C?ticket=c27a3525gg4ggff7f859f4a3a37c
is loaded which hangs blank. Only after I close it (be it desktop browser or mobile one) it redirects to my rocketchat interface.

It would be nice to press Login CAS and then have it redirect automatically to rocketchat without having to close the pop-up (it’s causing users to get confused).

Server Setup Information

  • Version of Rocket.Chat Server: 3.18.1
  • Operating System: Ubuntu 18.04
  • Deployment Method: snap
  • Number of Running Instances: 1
  • DB Replicaset Oplog:
  • NodeJS Version: v12.22.1
  • MongoDB Version: 3.6.14 / wiredTiger (oplog Enabled)
  • Proxy:
  • Firewalls involved:

Any additional Information


This looks more like an Issue instead of a support request.

The problem here is to reproduce the issue so it get’s easier to reproduce and feed the dev them with it.

is your CAS open source? Can you tell us what it is?


I’m using a Discourse plugin

The integration uses the CAS 2.0 protocol for authentication and authorization.