How do I install pgAdmin on TrueNAS Scale? Errors during deployment

TrueNAS Scale, version Dragonfish-24.04.2
app version is pgAdmin 4 8.11, chart version is 1.2.12.

I’m trying to install pgAdmin to access Nextcloud’s postgress database to create backups etc. and get stuck on Deploying step with the following errors:

If I provide a real email address when configuring the app with a real password for the email account (external to the TrueNAS), during the deployment I get an error, in Related Kubernetes events:
Startup probe failed: Get “http://172.16.0.143:30056/misc/ping”: context deadline exceeded (Client.Timeout exceeded while awaiting headers)

If I provide just the name without @mailserver I get a different error:
Back-off restarting failed container pgadmin in pod pgadmin-67699885ff-4kt78_ix-pgadmin(eace5ecd-e75f-49ce-b278-8c8e49f5c4e7)

Should there be an email server installed on the TrueNAS first? Do I use my local TrueNAS username? I could be asking wrong questions.

In any case I can’t install pgAdmin, can’t find any guides online on how to install it on TrueNAS SCALE, I’m new to TrueNAS and would really appreciate any help!

Thank you!

I have never attempted to add that to a TrueNAS Scale system so I do not really have any guidance. Perhaps someone in the TrueNAS Forums has some insight https://forums.truenas.com/