I am working with the Ext Js Design, everything me this working well, except when I make
it proves me it leaves

Error:
uncaught exception: Ext.data.DataProxy: DataProxy attempted to execute an API-action but found an undefined url / function. Please review your Proxy url/api-configuration.


For their position to the load dates it of a base MySql the grid he doesn't behave like it should be

Some suggestion?????

Thank you

Greetings