Printer (HP): failed to start scanner .. invalid argument

Trying to scan on a HP printer, xsane yields:

failed to start scanner .. invalid argument

Against the odds an almost identical install of EOS on a different laptop connected to the same printer works just fine. The plugin is installed correclty on both, I think.

Any ideas how to debug? Thanks.

journalctl -xe -f tells (sorry, the markdown code icon seems to have disappeared):

Sep 24 17:03:27 dell hplip.desktop[9383]: Downloading plug-in from:
Sep 24 17:03:27 dell hplip.desktop[9383]: warning: endeavouros distro is not found in AUTH_TYPES
Sep 24 17:03:27 dell hp-plugin[9383]: hp-plugin[9383]: warning: endeavouros distro is not found in AUTH_TYPES
Sep 24 17:03:35 dell hplip.desktop[9383]: error: Plugin download failed with error code = 8
Sep 24 17:03:35 dell hp-plugin[9383]: [9383]: error: Plugin download failed with error code = 8
Sep 24 17:03:35 dell hplip.desktop[9383]: error: file does not match its checksum. File may have been corrupted or altered
Sep 24 17:03:35 dell hp-plugin[9383]: hp-plugin[9383]: error: file does not match its checksum. File may have been corrupted or altered
Sep 24 17:03:40 dell hplip.desktop[9383]: Done.

Albeit

sudo nano /usr/share/hplip/base/validation.py

def init(self, pgp_site = ‘keyserver.ubuntu.com’, key = 0x4ABA2F66DBD5A95894910E0673D770CDA59047B9):

is set.

rm -r ~/.sane/xsane

solves the issue!

Interestingly, hplip-plugin aur package does not install and as mentioned above, the plugin cannot be re-installed either.

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