Error in Customizing for Condition Technique

What causes this issue?

Customizing for the access is not correct (condition table not
available or not completely generated, access fields not correctly
maintained).

System Response

Access is terminated.

How to fix this error?

Check other analysis messages for this access for errors and carry out
the proposed actions.

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

Error message extract from SAP system. Copyright SAP SE.