ls instead of gpg first to confirm existence of the files before using gpg.
When a GPG error is encountered, first try a web search for the relevant error. The [https://security.stackexchange.com security stackexchange website] can also help to resolve GPG problems. Describe the problem thoroughly, but be sure it is GPG-related and not specific to {{project_name_short}}.
More help resources are available on the [[Support]] page.