Hello there,
Currently there is not built in way to save the result of the quiz. In the premium version however you will have the access to the View Stats feature that will show how many users answered how many answers and how many of which answers in numbers and percentages. Also you would have the ability to export the individual quiz answers of the users (identified by the email they entered or their IP address) into an Excel sheet.
About the error if it is a JavaScript error, then it might be happening because of the plugin conflict. If it is not affecting any functionality of the plugin then I think going through plugin conflict isolation steps would be unnecessary. But anyway, if you want to go through plugin conflict isolation steps, let me know then I will provide you with the steps.
Let us know if you have any other questions.
Thanks.