ApolloShiloh

Tried restarting the computer multiple times. Granted, I'm using a virtual machine to play, so there might be errors popping up due to that.

I believe it is related to the virtual machine. I believe Riot's anticheat has virtual machine detection and doesn't allow them.

ApolloShiloh

How would you know this information when the Anti-cheat is not out as well?

The anticheat is installed as part of the installation process.

There was a League of Legends forum post about anticheat and virtual machines which provided some context as to why virtual machines were not supported but the League forums are gone now :(.