We're trying to assign priorities to work items and the option isn't even available. When we first started using Jira we were able to assign priorities to work items (Tasks, Epics, Stories, etc.) without any problem. However, at some point the ability to manage priorities for tasks disappeared. The work item priorities still show up in the boards and lists but no one is able to edit them. All new work items get a "Medium" priority by default and it can't be changed.
I have Administrator access and have tried several suggestions outlined in some of the comments/questions here. Nothing has been successful. We have a single priority schema (Default) which is associated with our spaces and it's using the default priorities.
We are pretty new to Jira so I'm sure I'm missing something easy. Again, no one can edit priorities (even Admin) but everyone can see them.