i have finished the vampire quest and had serana following me i told her to wait then i went back to her entered the dialog and follow me was not there then i told her to leave then she said she will go to darkfall cave [ i was in darkfall cave ] i then followed her out of the cave then she walked all the way back to Volkihar keep i then went and opened the dialog and follow me is still not there.
is there a way to fix this

is there a way to get rid of the 3 elder scrolls i am carrying i need 2 get rid of them i need the space

and the aetherial crown is gliched it will not let me have a standing stone perk at all as soon as a took it off i lost them both perks and when i put it back on there gone

She sadly did this for me to. Only way I can tell that fixes it is don't complete the dlc. I started the dlc over just to correct the problem because I really enjoy Serana as a fallower and I normally do not use them at all. Wish I had some better news for you.

okay to fix this DO NOT GET ANOTHER FOLLOWER just explore and eventually she will began to follow you happen to me before i was pissed. as for the scrolls idk dawn guard side you can give or sell them to the monk but i cant figure out what to do on the vampire side although if you've completed the main quest you can give the dragon scroll to the librarian at the college of winter hold

i had to buy back the elder scroll of the college to finish the DG DLC and it will not let me do that again

I had this issue when I was playing the game as a beta tester and I was hoping they would fix it. Clearly, they didn't. It happened to me twice and I reloaded my saves because I really like having her as my follower. It only seems to happen during the MQ line of dawnguard. If you can retain her (just make sure you don't tell her to wait or if you have to, save first and then check right away that the "come with me" option is in the dialog box. If it's not reload the save and try again.) through the whole quest and kill Harkon and finish the quest completely, then the problem seems to go away. Since finishing the quest, I have told her to wait several times and every time I go back to pick her up she follows me without any problems.

it happen to me twice best thing to do is to never tell her to wait. but if you just keep progressing and changing cells eventually she will spawn with you in a cell

I've also encountered the problem of the vanishing "come with me" dialogue.

Has anyone found a good way of fixing this?

Save before asking her to wait, it stuffs up, reload and forget about asking her to wait. So long as you always save first you are not going to lose her.

i've lost her completly i told her to w8 in the hall of contanence in the college of winterhold whilst i ran and get something from the archmages quarter and when i whent to pick her up she was gone.i checked the every room in the college fast travelled to the vampire castle but nope no sign of her anywhere