Cannot Save Changes to Replies

Replies: 0

Hi

I discovered that when I attempt to edit a ticket reply, I could not save the changes. The save changes button get stuck on “saving…” and just hanged there. If I referesh the page eventually, the page is not saved.
I disabled all plugins and tested again but the same problem persist.
Any idea what may be causing this. The plugin meets my need but this is a major issue if you can only create replies but not edit.

Thanks