If you encounter the following error message in a flow:
Composite Operation failed due to the following error(s)
Cannot deserialize instance of date from VALUE_STRING value Invalid date or request may be missing a required field at [Source: N/A; line: -1, column: -1] at [line:-1, column:-1] for Order
Reformat your date fields to YYYY-MM-DDTHH:mm:ssZ
For more information on date formats, see Format date and time in ISO8601.