Earlier The Toggle Studio app icon was showing  in the navbar on Production server but not now. I have checked in local(enterprise version addons) after installation of web studio app it's showing in the navbar. In the development server also I have checked it's showing but in production it's not showing.
I have compared all the permissions and settings with the development server. Both are the same but why it's not showing in the production server. When we activate debug mode with assets then toggle studio icon is appearing, In normal mode it is not showing. I uninstalled and reinstalled at that time it is also not working. 
Thank you!