TypeError: Cannot read property 'subscribe' of undefined

[nirajkaushal]

Note: I want to implement SurveyJS Builder in my React project.

I am getting errors while running this demo. I followed steps mentions here but unfortunately, it's not working in my setup.

Any idea how to solve this issue??

[tsv2013]

Probably you need to add the knockout js library. SurveyJS Creator (ex-Builder) depends on the survey-knockout library. You can reference this file for more details - https://github.com/surveyjs/surveyjs_react_quickstart/blob/master/src/SurveyCreator.js