Onepage Checkout error - Review is not defined

Question

I'm using Magento CE 1.9.0.1 with a custom theme purchased from ThemeForest, and I've enabled the necessary payment methods.

On the onepage checkout, if I click on Place Order in the final step (Order Review), nothing appears to happen. When I then checked in Firefox console, I see that the error ReferenceError: review is not defined shows whenever I click on Place Order.

I cannot for the life of me figure this out or troubleshoot what the problem could be. I've tried:

• Copying /skin/frontend/base/default/js/opcheckout.js into my theme's skin folder.
• Copying all of the files in /app/design/frontend/base/default/template/checkout/onepage/review into my theme's templates folder

The last point there was kind of redundant as the theme I'm using does not override any of the base onepage templates. I'm certain something is causing the review variable to not be defined, but cannot seem to find where this could be occurring.

Has anyone experienced something similar or can share any insight into how I can troubleshoot this? Many thanks!

EDIT: Additionally note that I have disabled the other 2 plugins I am using (Geolocation Currency Converter by Webkul, and Gift Voucher by Magestore) just so that I can try to eliminate what the problem could be. After disabling these, I still cannot proceed past checkout.

Answer 1

So just to let those who have similar issues know, the problem was with the GeoLocation Currency Converter extension. It did override some files, but more importantly, the review variable was not defined in templates/checkout/onepage/review.phtml. Uninstalling the extension and restoring some template files did the trick.

Answer 2

made a gist to fix the error in IE11 override template: app/design/frontend/base/default/template/checkout/onepage/review.phtml with my gist here: https://gist.github.com/roman204/c5468879074826dc9b1eb20a6bc5fca4