I played Minecraft earlier this morning with no issue, however when I attempt to access Minecraft now I get the following message:

Error: Could not find or load main class net.minecraft.client.main.Main
Java HotSpot(TM) 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release

Hitting "Play" after this will load the previous version of minecraft with no issue.

I have removed and reinstalled java, removed and reinstalled minecraft, rebooted, and deleted the .minecraft folder to no effect.

The attached log is the only text in the "Game Output(Username)" field.