A CurseForge modpack can finish installing normally, then close Minecraft before the main menu or while a world loads. The ...

Fix Essential Network not connecting by checking service status, refreshing your Minecraft login, and correcting account or ...

These are the arguments I used to run Minecraft on Legacy Launcher (a.k.a. the original TLauncher, which unfortunately had its name stolen and got DMCA'd by Mojang): -XX:+UnlockExperimentalVMOptions ...