I just flashed a SD-card with the latest buster image for RockPi-E
when I try to run apt update, i get following error:
Err:4 http://apt.radxa.com/buster-stable buster InRelease
The following signatures were invalid: EXPKEYSIG 5761288B2B52CC90 Radxa <dev@radxa.com>
Reading package lists... Done
W: GPG error: http://apt.radxa.com/buster-stable buster InRelease: The following signatures were invalid: EXPKEYSIG 5761288B2B52CC90 Radxa <dev@radxa.com>
E: The repository 'http://apt.radxa.com/buster-stable buster InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
How to fix it?