You were trying to use the 'Read the form from a web page' option in Simfatic Forms. However, some of the 'select' elements(drop down list/listbox) are incomplete.
All the options within the select list should have a 'value' (set using the 'value' attribute). The value is used to identify the selection made by the user.
Update your form page and correct the 'option' tags by adding a value attribute to all the options. Example:
<option value='blue' >Blue
<option value='green' >Green
<option value='yellow' >Yellow
<option value='red' >Red