When I am in mobile vr station and i click to install, it says are you sure it can cause harm, i say yes, then I click on install, then the package installer pops up and it is blank, nothing happens.
It's because you are on v74. On v74 you must install apps with Sidequest. Meta broke the package installer. Luckily once Quest APK Installer is installed it can install apk because I use another way to bypass the Meta issue
