Hello, clever guys. I'm trying to build my first PCB and send it to JLCPCB for fabrication. I thought it should be the mose easy thing to do, because for my fiest PCB I'm just planning use ready-made modules (DS3231 module, NodeMCU module, and RS485 module) which I already have, and just make female pin headers for them so I'll just have to solder the 'sockets' and to put the modules into them. So I made my schema, and just wanted to go to the PCB to be able to place the headers. And then I'm starting to get error messages about checking nets, and pins don't fit pads (which I think are for pins I don't need and I didn't connect..) Can anyone please help me make this accomplished? Many thanks!