Hello , when i try to use the schematica option , it said "schematica is not present." . Why does it says this to me ? How can i fix this ?

This is more of a question than an issue when making a post like this try to include more info so the community can be better assistance.
I'm assuming you're using the latest standalone of Baritone which is 1.14.4 schematica hasn't been updated since 1.12.2. IF you wanna use Baritone w/ Schematica use an older version or wait until Litematica is compatible.

litematica is compatible with 1.14.4 @Kioyo @Masterno25, use litematica and place the blocks yourself