Web Store: "Payment Method: Unable to Proceed. This business does not have any external payment methods defined."

Verify that Credit Card Processing Profile field is set in Setup > Site Builder > Set Up Web Site > Setup tab > Preferences section:

1. Navigate to Setup > Accounting > Payment Processing Profiles.
2. Edit Payment Processing Profile, highlight the Supported Payment Methods (ex. American Express, Visa, MasterCard, etc.)
3. Click Save.

If user supported payment method is Visa or Master Card the Payment Visual is required to be set up to avoid this error:

1. Navigate to Setup > Accounting > Accounting Lists > Edit the Visa payment method > Payment Visuals subtab

2. In the Flags column add web/standard and in the URL Column add:

Visa= /images/icons/creditcard/pmt_visa.gif

Master card = /images/icons/creditcard/pmt_mc.gif

Discover = /images/icons/creditcard/pmt_discover.gif

American Express = /images/icons/creditcard/pmt_amex.gif

Cash = /images/icons/creditcard/pmt_other.gif