Worldpainter Problems

I dont know if this is relevant to this forum but I figured someone here has to have some experience with world painter. I spent about 4 hours painting a world and exported which took forever, and then loaded it up into single player and I didn’t spawn where I chose spawn and the whole world was water except a tiny island . This map is massive but I flew for about 20 minutes in one direction and never found land. I exported for 1.14 and later, but Am Running 1.15.2 Minecraft. could this be the problem? Or is Minecraft just not loading the worldpainter edit?

i sort of had the same issue except i spawned in the farlands, can somone plz help!
BTW its the same w/ all my worldpainter world