Exact same problem, already occurred after 17min in flight.
checked the COND Ecam Page, afterthis systems frozen, can’t change anything. Plane still flying, but not controllable anymore.
I tried…. If I delete the inibuilds a350 folder in community folder, the inimanger doesn’t show install. It says it’s not installed.
if I press install, I doesn’t work also. Same situation, can’t start the flight, loading for ages.