Comment # 4 on bug 1204114 from Jonathan Kang

(In reply to Michal Suchanek from comment #2)
> It says which operation is checked but not what privileges are needed.
> 
> Oct 09 11:43:43 naga NetworkManager[10582]: <trace> [1665308623.6281] auth:
> call[46]: CheckAuthorization(org.freedesktop.NetworkManager.set
> tings.modify.system), subject=unix-process[pid=11013, uid=1000,
> start=102403016]
> Oct 09 11:43:43 naga NetworkManager[10582]: <trace> [1665308623.6348] auth:
> call[46]: completed: authorized=0, challenge=1
> Oct 09 11:44:06 naga NetworkManager[10582]: <trace> [1665308646.9554] auth:
> call[47]: CheckAuthorization(org.freedesktop.NetworkManager.set
> tings.modify.system), subject=unix-process[pid=11013, uid=1000,
> start=102403016]
> Oct 09 11:44:06 naga NetworkManager[10582]: <trace> [1665308646.9602] auth:
> call[47]: completed: authorized=0, challenge=1
> Oct 09 11:44:06 naga NetworkManager[10582]: <info>  [1665308646.9604] audit:
> op="connection-update" uuid="24996e10-e7ab-4e0d-abed-72ccc8364
> 160" name="VPN PRV2" pid=11013 uid=1000 result="fail" reason="Insufficient
> privileges"
> 
Check whether there are some logs related with polkit when NetworkManager is
trying to get authorization. It's not clear why NM failed to do so with these
journal.

BTW, did a dialog pop up asking for admin password when you were modifying the
VPN connection?