I am using JIRA v7.4.1. Today one of my projects cannot be seen outside the administrator area any more. That means,
I can see all the project settings, incl. roles and permissions, in the administrator area, however, - in the user area - no issues of the project are selectable, no trace of the project can be seen.
However, if I want to recreate the project, Jira mentions that "A project with that name already exists.".
And yes, I already checked roles & permissions: I definitely have sufficient rights to see the project.