The process or template contains a form field (in either a task form or a launch form) whose field type is date-time.
Possible Causes and Suggested Actions
The value of one of the date-time fields is not a valid date-time value.
The value submitted for this field must be a string that contains an integer. The integer must specify the number of msec since midnight on January 1, 1970.
The value of one such field is incorrect and needs to be replaced.