You have configured a workflow rule but it is not triggered even though the conditions are met.
SAP Cloud for Customer
Reproducing the Issue
Go to the Administrator workcentre.
Go to the Workflow rules view.
Open workflow rule 123(where 123 is workflow rule ID).
For this workflow rule the condition maintained is 'ABC Contains <blank>' here ABC is a field available in condition dropdown.
Though the condition is met, the workflow rule is not executed.
With the condition ABC Contains <blank> the workflow rule is never executed.
This is as we currently have a limitation if a condition with a field ending with  is used, and if we are comparing it with empty(blank) then the condition is never satisfied.
As a workaround we suggest you to achieve this through PDI by creating an extension field which can hold the value of required and in the condition screen to check whether it is empty or not.
workflow rule , condition ,  , KBA , workflow , LOD-CRM-WKF , Workflow , Problem