Why do I get the error Please correct the fields marked in red when registering an account but have no fields marked in red?

This error can happen if the buyer who invited you to register entered a Tax ID or DUNS number for your organization with dashes in it. If that is the case, you can correct this information by expanding the Tell us more about your business section and remove any dashes. You can also remove this information completely and then click Create account.

For more help with common registration issues, see here.

S2C Administration
SAP Business Network for Procurement & Supply Chain > Registration & Onboarding