Symptoms

If you click on Terms & Conditions on the last screen of purchase project, new windows is opened with the details of Terms & Conditions. If you click a link that redirects you to an external page it shows you the message "Can't open file":

Cause

There is no link set on the html template of the Terms and Conditions. The url is placed between <a href... and </a> tags but no url is specified in the href part:

Resolution

There is different solutions on the approach you prefer. Edit the template following the steps:

Billing > System > Setting > Terms > Terms and Conditions > select terms to modify > Edit 

Then apply the preferred solution: 

1. Add link to external url on the html Template on the following way:
2. Delete tags <a href... and </a> and let the url as plain text so the customer can copy url and search on the navigator:
3. Delete link as explained in solution 2 and add new paraph with information in plain text you want to show from the external url.