How to resolve the issues on onepage checkout not working?

[Ashish_k_php]

The website has a one-page checkout extension and not working after the billing information section when we click on the "Continue" button.

Please share if you have any ideas about these issues.

Thanks.

[amitsamsukha]

@Ashish_k_php ,

check your browser console you will see JS errors there 

quick resolution 
check if you are having 2 or more jQuery in the frontend. 

kindly Accept as a Solution if the issue is resolved and give Kudos  

[naheedmire215e]

To resolve the issues on one page checkout that is not working,

please go through the below mentioned line

https://community.magento.com/t5/Magento-1-x-Technical-Issues/Continue-button-on-one-page-checkout-d...