Very Odd Launcher Issue

I just got the Void Launcher, and it's already having a nasty problem. I tried to install and play Pokepack, but when I tried to play it the launcher gave me an error that says an MD5 check failed 3 times and that the install (I was actually launching the pack) had been cancelled. A reinstall fixed it... Or so I thought.
This morning, I fire up the launcher, launch Pokepack, and lo and behold, same error. And this time, I still got it on a reinstall. The error also says that I have an outdated...

Very Odd Launcher Issue