Hi Adnan,
For me when in NWBC I see a save as draft and second a save as active button. I have always selected this save as active button and it has worked for me.
You can see these buttons in the attached screenshot. Hopefully you have the same. This screen comes for me right when I cleck the New Bank Account button in NWBC from the Manage Bank Accounts page using SAP_SFIN_CASH_MANAGER role.
If you are on the same page maybe try taking SAP all access and then using this role to see if it is a security issue.
