Inquire about the cause of the form error

Please let me know if there are any errors when I type in HTML NAME or Picklist Value values.

So far, my experience has been that if the form HTML NAME has "-", it is not recognized as a required field on the landing page

If the Picklist Value value contains parentheses, the script did not work with custom code.

Is there a definition that can be proactive to prevent errors like this?