This isn’t ideal, and I hope you can resolve this with pharmahgh, but there may be a couple ways to rescue the vial if not.
One is just to keep it warm and liquid (not boiling, but just sitting in hot water) for a few extra minutes, and make sure to thoroughly shake the vial so that there isn’t a tiny bit of solidified stuff in there. Re-crystallization is accelerated if there’s a nucleus to grow from.
If that doesn’t work, it isn’t hard or expensive to filter sterilize a small bit of oil to dilute the vial. If the vial doesn’t have room, you can use a syringe barrel. If it gets to that, I’m happy to help with more detail.