I am trying to display a read only grid by using expression rule which is basically a query. But I am getting some error when I'm trying to do.This is the error."Could not display interface. Please check definition and inputs. Interface Definition: Expression evaluation error at function a!gridField [line 5]: A grid component [label="Read-only Grid"] has an invalid value for "columns". A grid column [label="A Id"] has encountered an error. Expression evaluation error: RTA Customer Data can only be indexed into using square brackets or the index function"Can someone please help me how to solve this?
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