I’m very busy making a schematic for work, but I think I found a problem. As you can see in my screenshot my electrical rules check gives me warning arrows of places that ARE connected. I may have made a mistake, please notify me if I did.
How do I get rid of those errors ? ( not the marking arrows I know that ).
The arrows don’t always mark the actual error, they may point to another connection on the same net. If you look closely, the “D103” (or is it DIO3) label near R7 is not actually connected. The same is probably true of the ground connection. It’s hard to see on that schematic.
I can not find any point where you supply your pcb so the error type 3 is a real error in this case. (You will need a connector for getting GND and 12V into your pcb. Add the power flags near that connector.)
At least such a connector is not in the part of the schematic you show us.