iSupplier, Supplier User Invitation URL redirects to Log in Page instead of Registration Form

Greetings

Help needed in making the URL link on the Supplier User invitation mail hyperlink to redirect to the correct registration form.

Currently after the internal supplier administrator sends an invitation to existing supplier (user) to register to have access to the iSupplier Portal. The URL hyperlink launches the login page instead of a Supplier Contact/Supplier user registration Page.

I am on R12.1.3 with the latest Rollup patch for iSupplier and Sourcing