That black spacer needs to be on the outside of the driver behind the retaining bolt....I'm not sure it will even work without it there.
It doesn't appear that you have the sheaves aligned correctly. You have the driver spaced far out with washers. I'm sure the driven is too far in.
I'm assuming they have a 2 sprockets in the bag.
Those other pieces in the bag are spacers for the driver and driven and the bolts are the wrong bolts for mounting. 4 small bolts are for the cover.