I’m trying to make a voltage divider. I need to split the wire between two resistors. The tutorial I’m following online doesn’t tell me how to split wires. The Add Junction tool, which looks like it should work, only produces the error “Junction location contains no joinable wires and/or pins.” no matter what I click on.
Your use case is very strange.
If you want to sample the voltage at the junction between two resistors, just click on the wire with the wire tool.
But, the other end needs to go someplace to be useful…