Deleting the key and re-installing the devstack again with the rest of the services.
Checked /etc/apt/sources.list.d for any bad or expired entries.
None of the above worked. Also, the expiration date of the ppa.edx key was a few days ago at 2021-12-05. Is it possible that the administrators can make an update or something like that? Is there any work around solution for this ?
Hi @veysel!
I faced the same issue, it seems keys have expired so we need to comment out the role which validates keys.
Follow these steps from the post, adding here to with additional notes.