Ensure the below link's Steps are followed to Proceed with "Create Bank Account"

https://www.gauravconsulting.com/forum/sap-s-4-hana/to-make-microsoft-edge-as-default-browser

STEP 1: Click on Create Bank Account

STEP 2: Click on Advanced

STEP 3: Click on "Continue to shana01.local.com (unsafe)"

STEP 4: Enter the User and Password (same as GUI) and click on Log On

STEP 5: Now you can fill the Below details to create a New Bank Account for your House Bank.

Follow this blog on How to create Bank account on Fiori App

Thanks,

Adharsh K S