Contract &1 (Product &2 ): Installation &3 has no rate category at &4

What causes this issue?

Contract <(>&<)>V1& (Product <(>&<)>V2& ): Installation
<(>&<)>V3& has no rate category at key date <(>&<)>V4&.
The contract given is used as a sample contract in the product
mentioned. It should have an associated installation that has a valid
rate determination.
Since no rate category is assigned, simulation for the contract is not
possible.

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?

Change the start date. If this does not help, correct the rate
determination for the contract.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.