Account registration with empty fields

[tuviks]

500 error when try to register user with empty First Name, Last Name and Email
A clear and concise description of what the bug is.

Steps to reproduce

1. Go to https://demo.virtocommerce.com/en-US/account/register
2. Enter UserName and Password
3. Left First Name, Last Name and Email empty
4. Click "Create"
5. See 500 error

Expected behavior
No error

Screenshots (optional)

Version info (please complete the following information):

• Browser version: Google Chrome 81.0.4044.138
• Platform version: Demo site

[lnetrebskii]

Task https://virtocommerce.atlassian.net/browse/VP-2335 has been created