Can't add Image in TinyMCE RTE

[halftrainedharry]

This is probably the same error as in this thread:

MODX 2.8.2 breaks Media Manager compatibility with TinyMceWrapper

After upgrading a few sites to 2.8.2, I noticed that the Media Manager doesn’t work when editing and trying to place images or link to documents. The Media Manager window opens, but it’s just the Media Manage title and a blank white screen. The Media Manager works just fine outside of TinyMceWrapper. Anyone else having this trouble? Any ideas on a fix?