Client Script does not fully function in Sandbox

Client Script does not fully function in Sandbox

I have noticed that the Client Script behaves differently inside Sandbox, compared to production.

For example, 
I am trying to invoke a function inside the client script. 
ZDK.Apps.CRM.Functions.execute("GetProductLocalPrices");

it would work in production, but doesn't work in sandbox.

in sandbox, 
ZDK.Apps would return empty object.

In production, 


In sandbox,