Code: Select all
Reading package lists... Done
W: GPG error: http://dl.google.com stable Release: The following signatures were invalid: KEYEXPIRED 1555048520 KEYEXPIRED 1555048520 KEYEXPIRED 1555048520 KEYEXPIRED 1555048520
Don't really see a fix for it yet, though I did find these askubuntu topics:
https://askubuntu.com/questions/1133273 ... ect=1&lq=1
https://askubuntu.com/questions/1133199 ... 53640db551