Some versions of RPM don’t like ASCII armored keys without a trailing newline. The key has been updated to have a trailing newline now. Please try re-importing the key.
Could you provide more context for the error you’re seeing?
What OS are you on?
what version of RPM are you running?
How did you get the key onto your computer?
Does the file look correct when viewed with a text editor?
What linux distribution are you attempting to install Duo Unix on?
If you’re using Centos 8 (non-stream) then you will have to use the old signing key (https://duo.com/DUO-GPG-PUBLIC-KEY-MAY-2030.asc)
For other older operating systems check out https...
Thanks for bringing this to our attention. There was an issue with the RHEL8 packages where the key wasn’t updated yesterday during the latest release. That should now be fixed. Let us know if you have any other issues.