I too have the same problems guys , I used to have FAB but then updated my launcher because methahuman animator plugin wasn’t working anymore, so now no more fab plugin the vault, a lot of my vault cache download are gone from the epic games launcher , very weird, also download unreal 5.5 thinking it might be integrated by default such as they did with Bridge in later versions but no luck and refreshed, restarted the EGL , my pc ,cleared cache, still no FAB plugin …and everything on library on web is not on EGL.
guess it’s a bug for all of us