Which one? Proxmox?
It needs more ressources because of containers but not that extreme. In this case there may be another issue if you just installed webtop and mail…
Do you use fast disks like SSD or NVME?
You could turn on debug log in Webtop app advanced settings to maybe get more information why it doesn’t sync.
There’s a migration tool to migrate from NS7 to NS8, see NethServer 7 migration — NS8 documentation
Documentation is available following the links on the main site: https://www.nethserver.org/
Info NS8: NethServer 8, application platform for Hybrid Cloud – NethServer
Dev manual: Home | NS8 dev manual
Admin manual: NethServer 8 administrator manual — NS8 documentation
Do you have 2 nodes in the LAN? Working DNS is mandatory, the nodes are talking over wireguard VPN.
You can only have 1 working mail server per node because it needs to use the default mail ports, see Mail server — NS8 documentation
To uninstall, you need to choose the installed apps in Software Center and click on instances:
You can uninstall by clicking on the dots menu:
There seems to be another issue, usually the logs page is fast enough (I use it a lot for testing apps)
You could check logs on CLI using journalctl
It’s already in testing repository and should be available soon.
Mail customization is documented here: GitHub - NethServer/ns8-mail: NS8 Mail module with SMTP, IMAP, Spam/Virus filter
Here is a custom config for using a smarthost.
I’m sorry to read that but IMO the only way to make a system stable is to raise issues (as you did, thank you) and fix them.
The container concept really has it’s advantages but it’s a new world to learn.