Step &: Deadline '&' on & at &. See message about deadline calculation

What causes this issue?

During the calculation of deadline '&V2&' using the reference point
(date, time) and time interval specified in the workflow definition, an
error or warning was reported, see above.

System Response

Deadline calculation returned the following result:
Date: &V3&
Time: &V4&
This time is used as deadline '&V2&' for the work item for activity
&V1&.

How to fix this error?

Please check the reference point (date, time), time interval and time
unit (minute, hour, ...) specified in the workflow definition.

Error message extract from SAP system. Copyright SAP SE.