After upgrade from 6.10.2 to 7.2.0 server rocket.chat not working (502 Bad Gateway)

Description

Taking into account the update algorithm and recommendations for updating versions, as well as installation requirements and installation instructions.
There were problems
issue-1 - with creating indexes of uploads files when I uploaded them before the first launch of the rocketchat service. This was solved
issue 2 - with deno work, this module was not updated automatically, and the new version of rocketchat requires the corresponding version, you need to install it when the updated version is already needed. This was solved
issue 3 - nginx “connect() failed (111: Unknown error) when connecting to upstream” after this error I stopped updating further and rolled back to a snapshot VM

Server Setup Information

  • Version of Rocket.Chat Server: update from 6.10.2 to 7.2.0
  • Operating System: ubuntu 22.04.
  • Deployment Method: tar
  • Number of Running Instances: 1
  • DB Replicaset Oplog:
  • NodeJS Version: upgrade from 14 to 20
  • MongoDB Version: 5
  • Proxy: nginx
  • Firewalls involved: ufw

Any additional Information

Also after updating to 7.2.0 everything started, I was happy, but after entering the integration settings, the APP CRASHED window appeared and from that moment error #3, indicated above, began to occur, which I was never able to overcome

Is this you?

Duplicating issues does not get things fixed faster. You just get ignored.

Answered on the issue. Follow up there.