Pay Per View one time use only reloads the page

I've installed Pay Per View, added my PayPal credentials and Pay Per View one time use does not work.

Clicking the purchase button causes the page to reload with a hash tag at the end of the url eg, clicking on the link on site.com/story reloads site.com/story/#. However the day pass and subscription options take the user to PayPal after registering or logging in with social media credentials.

What may be the solution to this problem?

Thanks.