New user roles - RTC able to login but web not able to login

Hi all,

I created new user roles for purchasing manager. This role has below permissions.

1. Create purchase order
2. Create vendor master
3. View posted purchase receipts and posted purchase invoice.

I configured role and able to login in RTC 2016 but not able to login in web page.

Refer to attached error from web page screen i can't identify the error.
How to identity this permission error?

Please advise if anyone faced this issue.