I reinstalled my OS (Linux Mint) today and copied all my projects over to a flash drive. After I was done setting everything up I copied 'em back over again and started to fix the problems (caused by new jdk location, new android sdk, etc).
When I opened one of my libgdx game projects I found some errors (29) similar to the following:
Library gdx-1.6.1 has broken classes path: /home/gameplayjdk/.gradle/caches/modules-2/files-2.1/com.badlogicgames.gdx/gdx/1.6.1/bb5fe9832bcfe4bbc1de6bd357085b8a2a845d9c/gdx-1.6.1.jar [Fix]
Apparently the libgdx libraries are no longer present in the gradle cache, which makes sense since it's a whole new system.
Now I don't know how to make stuff work again. Any Ideas?