Recently, when we try to manually create an issue by clicking the "Create" button, it doesn't work. We don't know exactly when this started, but we know it's been in the past month or so.
When we click the Create button at the top, the normal form appears where we can fill in fields (and choose which fields we want to see for the issue). Once we have the fields filled in, we click the Create button at the bottom of the form. Nothing at all happens; no error message, the form doesn't go away, the issue does not get created, etc. Literally nothing happens at all. You can click the Create button as many times as you want, and nothing will happen.
Similarly, for issues that have already been created, pressing the Update button does nothing.
However, issues can still be created through the customer portal in Jira Service Desk. So that part works completely fine.
We were on on Jira 7.13.0, so updated to Jira 7.13.1, thinking that might fix it, but it didn't. We can't upgrade to Jira 8 yet because we have plugins that have to be updated first.
Any ideas?