I think there might be some discrepancies between hplip and hp-plugins. I am not tech savvy enough to troubleshoot. Ended up loading a different distro last night to get some documents scanned.
I should have copied/pasted the error - signature key was wrong. Files did not match. I could not download the driver as packages were not corresponding. I jumped on a backup distro and hplip worked flawlessly, downloaded the correct driver for my all in 1.
PS: I removed, purged hplip…reinstalled. Same error. I obviously do not scan much. My printer printed w/out difficulty…it only was an issue when I had to go through the hplip setup to download the full driver.