When an issue is closed, any attempt to reopen it generates an error that says:

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Form Errors:

• Unable to execute post workflow function. Issue may be in an inconsistent state. Please inform your system administrators immediately. Validation of the field 'resolution' failed: [] {resolution=Resolution is required.}

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In the log, there is an error, I've attached it. I've also attached a screenshot of the error window, for
what that's worth.

Note that the item IS reopened despite the error message - it just gives an error. If the resolution is changed
on the "reopen" page, that is also ignored and the status will be whatever it was when the item was closed.

Looking at the workflow, I see that the first postcondition is this:

" The Resolution of the issue will be set to ."

Looks like a problem to me. Of course, I can't edit the workflow, since it's in use, but I'm betting
that if I copy it and make that something reasonable, it will work.

Other things of note: I believe we have the Resolution field as a required field; I am going to
change that to NOT required and see if that fixes it. Plus, I'll see if copying the workflow and
changing that postcondition to a valid one helps.