Uncaught ReferenceError: i is not defined

My forms have stopped showing and I’m seeing an error in the browser’s debug window. Are the 2 things linked?

Uncaught ReferenceError: i is not defined
at smartFormGenerator.ExecuteConditionalLogicInAllFields (bb3ef.js:870)
at smartFormGenerator.FormLoaded (bb3ef.js:867)
at smartFormGenerator.CreateForm (bb3ef.js:860)
at new smartFormGenerator (bb3ef.js:835)
at smartFormsLoadForm (bb3ef.js:986)
at HTMLDocument.<anonymous> (bb3ef.js:985)
at c (5b832.js:1526)
at Object.fireWith [as resolveWith] (5b832.js:1526)
at Function.ready (5b832.js:1526)
at HTMLDocument.H (5b832.js:1526)

The page I need help with: [log in to see the link]