The SRAM SS chain is 1/8", so it's going to rub some when running a bashguard. You can put the chain together without the power link to stop the skipping.

You can try moving the spacers around on your hub, if you've got the room. It looks like you've got a Shimano freewheel. If that's so, be careful, because those splines will chew your frame up if they rub.