Updated to 7.19 and am having at least one page not rendering with the above JS error.
Some weird things on the page:
A couple of fields are showing up as “Unknown Field” even though I double checked they are added to the model. If I go and add the same field into the table, the Unknown Field is replaced with the correct name.
I tried cloning the page, but get the same issues. Also tried stripping the page down and still receive the error.