Checking means-of-transp.capacity for means-of-transp.type not possible

What causes this issue?

The capacity check for the means-of-transport type could not be
executed. No means-of-transport type was specified.

System Response

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

How to fix this error?

Enter a means-of-transport type.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.