UI5 not supported CSS
We are try to build some custom CSS for our FIORI theme from theme designer transaction. And it is throwing a warning message as "UI5 not supported Custom CSS". We are using Chrome Browser. These are the support pack levels for which we come across the issue
SAP_UI Release 740 and Pack 0011
WEBCUIF Release 747 and Pack 0007
UICRM001 Release 100 and Pack 0006
Please advice how to overcome this issue?