Need help resetting ruler zero-point InDesign CC 2018

I have searched all over Google and these forums, but have come up empty handed on how to reset the zero-point of the rulers in InDesign. The advice of "double-click the box at the intersection of the rulers" has not worked. I've tried this after changing the ruler type to be "per page" or "per spread" or "per spine". I've tried a few other things, such as this script:

app.documents[0].zeroPoint = [0,0];

I've also tried closing InDesign, updating to the newest version, and opening a new document, but none of these steps have worked.

Any help would be much appreciated!

Here is my current workspace.