It shows a message on my notifications: binding socket to network 100 failed: EPERM (operation not permitted)
Haven't changed anything all was working smoothly till now on my P6a
What can I do? What is this?

Do you use a VPN? Do you use Tor? Do you use a custom DNS?

A screenshot would certainly help here, as I haven't seem something similar before.

Are you sure that the source of this is the GrapheneOS Updater app and not something else?