There are no deadlines for the selected deliveries/shipments

What causes this issue?

In the shipment stages, no planned or actual deadlines are specified
for departure and arrival of the selected deliveries.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

The diagram showing deadlines is not displayed

How to fix this error?

Maintain the deadlines in the shipment stages and carry out the
function again.

Error message extract from SAP system. Copyright SAP SE.