If you receive this error message when you are trying to create a new list, check to make sure that you entered a name for your list. If you did, make sure it follows these conventions:

1. List names must be all lower case.

2. The first character of the list name must be a letter or number.

3. The rest of the list name can contain letters, numbers, dashes (-), periods (.), plus signs (+), and underscores ( _ ).

4. The list name cannot have spaces.