There are a few cases where a user could have either an invalid d-keyring.gpg or it could be out-of-date. The install.sh script should be updated to detect invalid keyrings and update them when this occurs. This can be done by checking the SHA of the d-keyring.gpg file and removing/downloaded the latest when it doesn't match.
*** Issue 19166 has been marked as a duplicate of this issue. ***