Can't auto update from the "site configuration/control panel "

[obj]

Hard to tell without proper logs, but it is probably the issue described here:

A note on updating old Buster installs

If you’ve got an older Buster install (Raspberry Pi OS or piaware sdcard image), and it has not been updated for a while, when updating using apt-get you may run into this error: E: Repository 'http://flightaware.com/mirror/raspbian/raspbian buster InRelease' changed its 'Suite' value from 'stable' to 'oldstable' N: This must be accepted explicitly before updates for this repository can be applied. See apt-secure(8) manpage for details. This unfortunately does affect PiAware 5.0 sdcard images.…

please try the instructions there, or reimage with a fresh 7.1 image.