Question: using with (VLA)

Hello all

when i tried to use the library "with(VLA)" i always have this problem :

 with(VLA);
Error, invalid input: with expects its 1st argument, pname, to be of type {`module`, package}, but received LA
 

but i have sow in many videos that its working and they applied it in same way.

 

any help please > >  

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