I keep getting an InvaIid Date error when filling out, but there is no field that has a date on the form, what's causing the issue and how to I fix it?
In recent updates (Feb 2020) with Salesforce there have been some errors with date fields. If there had been a date field that was previously filled in, the autofilling component on the browser has retained the information, even if the field is no longer on the checkout form.
Find the history section of the browser and clear history of the Autofill options. Some browsers might have different names for these actions.