So I'm standing in the Tower of Mzark, in front of the four buttons and the glowy thing. I'm supposed to put the blank lexicon on the glowy thing.

There's nothing permitting me from using the lexicon.

There's no 'activate' or any option with the green glowing dial. There's no floating arrows indicating what I'm supposed to do, either.

if it means anything, I didn't go through the Alftand ruins, I went through Mzinchaleft.