Im trying to build a Netherwart Farm and when i try to place a block on top of another or extending the original placed block it will say action prevented by easy place mode? If I go to another client it will allow to place the block but for litematica it wouldnt allow me to. Im on the ExodusMC Server, and I know they allow printing and schematics on the server.

The Easy Place mode tries to prevent wrongly placed blocks, so it won't allow you to place anything that isn't in the schematic, within 2 blocks of the schematics regions. Are you trying to place something that isn't in the schematic? Then you have to disable Easy Place mode while you do that.