tlmgr: unexpected return value from verify_checksum: -5 for main repository

Question

When I try to install a package using tlmgr, e.g.:

$ tlmgr install adjustbox

All I get is /usr/bin/tlmgr: unexpected return value from verify_checksum: -5.

In tlmgr: unexpected return value from verify_checksum: -5 this error is caused by an out-of-date GPG key for tlcontrib, but I only have the main repository according to tlmgr repository list. I also tried re-downloading the key from CTAN and adding it, but that didn't work.

I'm running Ubuntu 19.10 and TeX Live 2019.

Any help would be appreciated.

Answer 1

For anyone encountering the same problem, the keys of the main TeX Live 2019 repo have also expired as of today (April 7, 2020). The verification check can be skipped using the --verify-repo=none option of tlmgr, just like this:

tlmgr --verify-repo=none install adjustbox