Entry in TACOB performed, activation takes place in background

What causes this issue?

Certain time limits apply to the activation of ABAP/4 Dictionary objects
in SAP in-house systems. You can flag objects for background activation
by entering them in table TACOB using transaction SM31. You need to
enter the type and name of the objects concerned.

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?

Error message extract from SAP system. Copyright SAP SE.