Hello Plex folks! Plex packages are still being signed with sha-1. This is no longer supported by Redhat Enterprise Linux 9 (Redhat/CentOS/Rocky 9). The relevant article is here: https://www.redhat.com/en/blog/rhel-security-sha-1-package-signatures-distrusted-rhel-9
I hope Plex plans to start signing their packages with SHA-256 in the future.
Yes, there are work-arounds (mentioned in the article). But. . . let’s hope they’re not necessary for long!