Okay so After working on sandbox of Evernote, I applied for production server API approval few days ago. So recently i got mail from their customer support stating that they have activated my API key on production server. So i can't figure out what to do next,i tried creating dev token for production server but it says that currently creation of developer token is disabled. enter image description here
Dev token and API keys for OAuth are two different things. If you just want to create a dev token for your account, see here.
