Issues with process-signup file, database connection

[LEDCat]

Hello, I was following your tutorial up to the point where the ability to insert a new record is created. However, I've been unable to have the form submit information from the inputs; submitting the form only results in the generic HTTP ERROR 500. The only further details I can find (through the Google Chrome console) is "No resource with given URL found", and "crbug/1173575, non-JS module files deprecated".

[LEDCat]

Apologies, what fixed this was me adding the needed JustValidate script to my homepage html. But now I get an error 404, with the email input saying "email already taken" even though it is a completely new email.

[daveh]

What URL is giving you a 404 code?