Hi samruddhiz ,
Thanks for sharing the extra information.
We've tested the OceanWP theme, together with Woocommerce and Buttonizer on two different environments, but unfortunately we couldn't reproduce any issues.
Do you have a development/staging environment available where we can see Buttonizer/the checkout page of Woocommerce not working? Then we can look at the JavaScript errors that appear.
It might also be that you're using a caching plugin and it's affecting the already minified and complied Buttonizer code (more information about that in this Knowledge Base article).
Let us know 🙂