When I tried to update Minecraft from 1.16.2 to 1.16.3, the launcher said that the newest version of Minecraft was my 1.16.2 version of optifine I had installed. When I went to make a new instance of Minecraft, no new versions showed up at all. So I tried to re-install the launcher. That didn't work. The next thing I did was a clean re-install of all Minecraft. (deleting the program files) that didn't work. So as a last-ditch attempt I did a fresh start on my pc. (I had needed to for a while anyway) and somehow that didn't work either. What the hell is going on?
Hi Chandler, we are aware of the problem and looking into it. We track this issue as MCL-14369. Thanks for letting us know, check out that bug if you want to add more info to help us!