Errors generated by a project with no form set

[jmotis]

While saving after editing a dataset that was created but did not yet have form fields, I ran into a set of error messages that I wanted to document. Adding a form field to the dataset fixed the problem and allowed me to save as normal. This may just need to be documented.

(Attached file is an HTML/source file saved from my browser, then compressed to a Zip file to enable GitHub upload)
no-form-fields-error.html.zip