Why does this request give error 2892? The application name is correct.

https://precreator.zoho.com/api/json/myapp/forms/?authtoken=0e508cec205591dc3f137662b614f2fb&scope=creatorapi I don't know why this gives an error. The authtoken and application name are both correct. Is this a bug? If not, how can this be fixed? Thank you.