With LowerInstall installed, some apps (I tried YouTube and Slack) just will not install, even if reverting the config to default. With default hardware and software versions it should not affect anything, so somehow this tweak is breaking the installation of some apps. Other apps (such as Discord) install just fine, even if the newer version won't run.
This is a shame because it would be nice to also use LowerInstall to spoof an older version of iOS to get an older version of an app such as YouTube which performs much better. Just discovered App Admin which does this
