Hello!
Respected Client,
I have checked the video on dropbox. Let's discuss the issue and it's solution. You have clicked view source in the video which allows me to check the system source code. First of all you are using wordpress plugin which is wp-pro-quiz. It means that all the code is in the plugin and quiz are being generated from the backend. Issue is with the plugin's code.
Now, without making a choice listed for a question, if user clicks the next button, everything freeze. I don't call it freeze. :) Basically, the whole javascript of the plugin fails and stopped working. In such case other JS functionalities on the page also stops working and all processes exit and no client side functional executions take place.
This is called exception or error handling in terms of programming, which is not done in the plugin code.
I will need to code error handling section in the plugin and then these issues will fix. For example, if user will not select an answer from the list then it must show a warning or notification on the screen to select one answer to move forward to the next question.
This is the issue with your current code. I can fix this issue within 24 hours. I need you to provide wp-admin and ftp credentials to start this project and complete it as per your requirement and satisfaction.
I hope you will consider my proposal for this job.
Thanks,
Best Regards,
Khubab