Launcher says Engine not installed when it is

[ryguydavis]

Someone on our team just had this issue and he was able to fix it by clearing the Launcher cache. I hope it can save you some time!

https://www.epicgames.com/help/en-US/c-Category_EpicGamesStore/c-EpicGamesStore_LauncherSupport/how-do-i-clear-the-launcher-cache-on-pc-a000086158