Issue import LoopBuf extention Mac Big Sur

hey I have been trying to import the LoopBuf extention from

using SuperCollider-3.11.2+BigSur.aed25fa and before

each time i uninstalled and erased the supercollider file in application support and application.

i keep getting the
exception in GraphDef_Recv: UGen ‘LoopBuf’ not installed.

when trying to use the class, i did recompile library and reboot interpreter every-time ( and restart the app =D)

please what am I doing wrong

my bad i got the right version