blue/green wire on sidestand switch is comming from ECU and black wire should be connected to the bikes frame, which is negative pole of complete electrical circuit ... when sidestand is in upright position, switch attached to it is bridging those two wires and blue/green is directly connected to the bikes frame ... when sidestand is in parking position, switch has function to open electrical circuit between blue/green and black wire on connector ... if the black wire is cut somewhere or it has bad electrical contact to the bike's frame due corrosion or lose wire, engine could not be starter (unless engine is in neutral gear or clutch lever is pulled-in - but forget about this now) ... idea is to connect blue/green directly to the bike's frame, somewhere where there is no paint and conduction of electricity if good enough ... this should eliminate problem with sidestand switch and perhaps broken black wire connection to the bike's frame

I can't make any photos with procedure of doing this, unfortunately ... perhaps Kev can do that ...

if you manage to make any of the above, try to reset malfunction history again and try to start the engine