Hi, I'm trying to make a PCB for an overdrive pedal. I'm new to making PCBs so I picked a simple circuit. Right now I'm stuck at the Design Rule Check for the schematic though. It gives me an error that says "This netlabel is not connected with any pin" and then it highlights all the connections to ground. Here is the schematic with the highlighted nets:  I find this totally baffling because it says it's not connected with any pin, but several of these nets are quite literally connecting the netlabel to a pin and nothing else. I pretty much just want to have a ground plane and to connect various things to it. I imagine that's a fairly common thing to want to do, so I must just be engaging with the software wrong. But I can't find a single thing about this specific error in the documentation.