Why is my Multi Search/Browse Page not working?

Problem:

I have enabled Multi Search Page on the Table, but when I press the ‘+’ button it doesn’t bring up the search page popup. Instead, it behaves as normal and adds a row to the table.

Solution:

There is a setting in the site.config file called DisableMultiBrowsePage that must be set to False. If it is set to True, Multi Search Pages will be disabled on the action hub.