after updating our environment to update 15, I face the below error when export data by using data entity 

"Configuaration key not enabled for the entity '####Entity' "

when I check the data entities 

I see the below warning 
"entity list must be refreshed from the framework parameters ..etc"

To solve the above error and avoid the warning 

just go to framework parameters 

and click the entity setting tab 

click Refresh entity list and wait until refresh complete 

if you back to export again 

no error found and no waring in data entities list