I've had 2 different saves now, that will not let me go into Castle Volkihar. I rescue Serana, I got there, nadda. I cannot enter.

I tried it with no mods, re-installed Skyrim, tried again with whole new game(after deleting every save.)

Nothing. Anyone know why or has had this issue, perhaps fixed it? I even tried this console command: movetoqt dlc1vq02, to go to Haarken, but if you run to door to see if it works from the inside, says you need a key. But then everything will bug out, everyone think's Serana is there, but she is still outside. I repeat, I've tried this without mods, with mods, etc.. I re-installed Skyrim, brand new whole game, with all date from previous game(lvl 54 2H Warrior), gone. Still nothing.

If you use said console command, get banished from the place, she still follows you around. She flat out won't go in the durn place.

Has anyone had this issue & fixed it? Would love any kind of help.