Undefined "toString" error on Survey presented on ServicePortal

[Community Alums]

Hi All,

When the survey is presented in the page my_surveys page and when click on any Survey, we get a error as shown in screen shot below... and this is repeated when we fill survey first list of questions and move to next set of questions using Next button. 

Error text pasted here : "Exception found: TypeError: Cannot read properties of undefined (reading 'toString')"

I tried updating the instance option of widgets on this page, still didnt help.

I get same error when in Instance page editor mode .. just click on instance / or on widget 

There is a routing between take_assessment Page and take_survey page.

Please advise, bit lost on where to trouble shoot.

[Sandeep Rajput]

@Community Alums This error indicates that your script is trying to run a toString() method on a null object. Please check scripts related to Survey and see if any such conversion is taking place.