Hello @orezbodajoy
This issue could be related to the Ubuntu kernel version 110 having a regression. If you are running kernel version 110 (check with uname -r).
See https://forum.cloudron.io/topic/15265/unusable-application/39
If you are running Kernel version 110 and you'd like to try, you could apply this patch manually https://git.cloudron.io/platform/box/-/commit/bffc97ab2fedb06100bc507abd0f8b42d343ea6e and then systemctl restart cloudron-firewall.
If this resolves the issue, please report back.