You are required to uninstall all {0} add-ins before turning off {0} features. Go to the {0} Dashboard and uninstall all ...

You are required to uninstall all {0} add-ins before turning off {0} features. Go to the {0} Dashboard and uninstall all add-ins,  You can then return to the {1} and proceed with turning off {0} features. Note that once the features are turned off, you will not be able to turn them on again.