XenForo XF2.1 to 2.2 upgrade - Page does not refresh when submitting a PM and sometimes a regular post

C

CZ Eddie

Guest
I did an upgrade from Xenforo 2.1.2 to 2.2.16 RC2.
And now when someone sends or responds to a Private Message, the page does not refresh.
And once in awhile, the same thing happens with regular forum posts. But mostly it's PM's.
It remains on the page where you just typed your message.
So, it looks like the message didn't go through and users will keep hitting "submit" over and over.
But in reality, the message went through fine. So, we're getting duplicates.

I've made sure to CHMOD 755...

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