Affects Version/s: 7.0.X, Master
Steps to reproduce:
1. Opened Content > Categories and selected "Add vocabulary"
2. Under Associated Asset Types selected Document and pulled the Required toggle to Yes
3. Added a Category to the Vocabulary
4. Went to Blogs and clicked "Add new Blog Entry"
5. Clicked on "Select File" in the upper drag and drop area
6. Clicked on the tab "Documents and Media" in the popup
7. Clicked on Select File to upload.
Expected result: It should either be possible to select Categories manually during the upload, or upload option should not be present at all.
Actual result: Document cannot be uploaded. Progress bar disappears and Select File page comes back.