Could just be a fouled plug. But first, try to start the bike. After a couple failed attempts. Pull out the plug. Is it wet? If not then there is a fuel flow issue. Replace the plug with a new one. What ever your preferred brand of spark plug, but NGK b6hs, I preferr the hotter b7hs, is the reference. I have good luck with champion plugs as well but cheap plugs are just that.
I hope that was all it is and you can get running again soon!