Thank you for sharing your expertise on my pcb design.
The RFID won’t be placed on the board itself, so I have replaced it with a 8-pinheader. So the drillholes are okay. I did the same with the dfplayer to fix the problem with the wrong sizes. I would even fix the part myself, but I don’t know what is exactly to do…
The LOLIN32 and the DFPlayer will be placed onto pinheaders.
I have moved the SMD part to the edge.
The DRC problems where only existent because I increased the configuration to have more space between the traces. Otherwise autoroute putted lines beween the dfplayer pins. I set it back to the “professional” settings and everything was fine.