Did you look at the schematic I posted in ieLogical with ERC Fixed ?
I corrected your 0vA symbol and M-125 Power Trans symbols to use the proper pin types. I then updated the symbols on the schematic from the revised library. I added a No Connect flag at M-125 OPT1 pin 7 and removed your ERC exclusion. I added three PWR_FLAG symbols; at 0vA, C303, and pin 2 of SW2.
With these modifications your schematic remains largely unchanged, but it now passes all the standard KiCad ERC checks with no exclusions.
KiCad’s ERC can be useful if you work with what it does rather than expecting it do things the way you think it should work.