Change approval link request giving 403: Access Forbidden error message through email notification.

[Kanna12]

Hello Community,

I used OOB feature  ${URI_REF} to generate change request link in approval email notification.

1. When i open the link directly via email it is showing "403:Access Forbidden" error. But

2. If i open my service now instance and open the link via email, it is showing approval page in service now.

I am not sure why approval page not opening theough email link.
Approval always needs to open SN Instance and opening Approval link via email notification.

Please suggest me, If i miss anything here.

Thank you

[Kanna12]

When i Click the approval link via email it should display my organizational Servicenow login screen.
Right now it showing 403 error.

But when i login into Servicenow and click the link again, it is showing change request approval page.