Error started happening without any site changes made [RESOLVED]
I haven't made any changes to my website or server or database in recent months, but just a few days ago I started getting this error ONLY ON DESKTOP. The error happens when I click on a discussion thread on desktop. The Vanilla forum appears to fine in all other areas on desktop including the forum dashboard, it's only when a discussion thread is clicked. On mobile, everything still works fine. Here is the error message:
I would appreciate any help in debugging this mystery. Thank you!