Resolve Error “An Internal Error has occurred” when Logging in through Website

Scenario

There are instances that when an existing Website Shopper attempts to login through the Website using Customer and/or Contact credentials, results to an error describe on the title.

Solution

1. Global Search: Enter Affected Customer
2. Click Edit
3. Email: Update the email address
   
   Note: This is only used temporarily. (i.e.: from: customer@gmail.com to: customer-new@gmail.com)
4. Click System Notes tab
5. Click Access sub-tab
6. Manually Assign or Change Password: Enter checkmark
7. Password: Enter a password
8. Confirm Password: Enter similar password
9. Click Save
   
   Note: After this step, login through the website using the new Email Address. Once confirmed that issue no longer persists, revert the original Email Address, repeat the steps above and re-login.