Changes of File Rating doesn't work for me

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Hi, I need to change the file rating in Device Lis / Endpoint / FIle list but after applying the change from the drop down menu, the raiting of the selected file remail the same. Thanks

[datalink]

Also I'm not able to "Rate as Trusted" an application in the "Antivirus / Current Malware List" (the choice is greyed out, probably because the "File Hash" column is empty.)