offline compiler and emulator in shader development studio

i add the "/home/apuser/Mali_Offline_Compiler_v4.1.0/Mali-400/malisc" in compiler of shader development studio in preferences,but the follow warning happens:

Description                                                                               Resource    Path         Location    Type

Offline compiler not found. Configure a compiler in preferences.    s.frag       /success    Unknown    MaliSC Reported Problem

why?

and when rendering using opengles 2.0 emulator,the following warning happens:

Please check your Renderer:

- Is the correct one selected in the Shader Preview window?

- Is the address in the Renderer Preferences correct?

- Is the renderer running and waiting for connections?

why?

thanks