I'm a bit late to the party, I know. After getting the "There stands the grass" and "You can depend on me" quests I'm unable to enter the office of Hildern/Williams at Mccarran. I get stuck in the doorway, able to look around but that's it. I've searched all over and cannot find a fix for this.

The ED-E logs have already been unlocked, none through Hildern.

Any help whatsoever, please

Have you tried restarting the game and load the last autosave (entering Terminal building)? Sometimes the engine glitches out for no apparent reason, and when you restart it's fine.

I've tried that many times. I even did a bunch of other quests in the mean time, but now I have two reasons to enter the office and I can't. I've reloaded saves, restarted the game, reloaded far earlier saves. I have yet to reinstall game data, but I'm trying to find a less drastic fix.