Payment link redirecting to 404

Hi,

I have just installed the plugin on my site, nbidigital.in. After configuring the plugin, I send a payment reminder to a client but the link in the email is redirecting to a 404 page.

I think the problem is with the page. There is an option under the business process to select two pages. One for,
Display dashboard on the- which is currently set to (Not selected)
Display invoices on the- For this I reated a new page and selected it. (Make your Payment)

There were no page autocreated by the plugin. Please help