Same thing happened on my 500 due to being laid over on its side. A forum member and very experienced 500 owner, (Bikerbill) responded that the oil pressure system had probably lost its prime and needed to be "burped". The engine can also lose its prime right after an oil & filter change. If it's either of those, the "burp" process is fairly simple. Start the bike, loosen the oil filter just enough to allow some oil to escape past the filter oil seal. You may notice air escaping as well (reason why it's called a burp). Quickly re-tighten the filter. That may work and the warning lights will go out IF it's air in the oil passages causing loss of pressure.
Perform this as quickly as possible and don't rev the engine. If that doesn't work don't run the engine any more until you determine the cause.