Re: [PC] ME3 LE Leviathan Cutscene/Dialogue failing to play *Spoilers?*
It is likely that this is a mod issue.
Vanilla the game with your backup, or in case you don't have one repair the game. (That will purge your mods, but you can reinstall them later on.)
(Origin: Game Library > Right-click the game cover > Repair)
(EA app: My Collection > Click on the three dots on the game cover > Repair)
(Steam: Game Library > Right-click the game > Properties > Local Files > Verify integrity of game files.)
