Terrible bugs I'm having.

[RYANSUPERGENIUS1123]

In Concert Hall Foyer, I can't put my hand in the linking book pedestal slot to add the Concert Hall Foyer's link to my Nexus. :/ And in Ahnonay, I got inside of the stone tower, but I don't see a lever in the tower that powers up the lever in the Ahnonay Control Room 1 that I swam to, so the lever is useless, since there's a lever missing from the stone tower. :/

[Alien]

Re: Concert Hall Nexus Link ... I would not worry too much about not having that. I got so fed up of it on my Nexus when I never use it, I actually deleted it off my Nexus and now I don't add that one any more.

Re: Ahnonnay ... I have had that same problem and cried help and someone suggested I might have linked into the wrong tower. Instead of linking into the water island tower, I linked into the misty island tower.

[Jogi]

In Concert Hall Foyer, I can't put my hand in the linking book pedestal slot to add the Concert Hall Foyer's link to my Nexus.

Come on Ryan, you super genius , this is what you call a 'terrible bug'? What kind of an important game fun do you have to waive without a direct link to the Concert Hall Foyer in your Nexus? -- By the way, the cursor hotspot for the registration procedure in this case is just a little bit shifted upwards. Have some tests!

And in Ahnonay, I got inside of the stone tower, but I don't see a lever in the tower that powers up the lever in the Ahnonay Control Room 1

This is no bug, this is MOUL specific. In this version of URU you need a second player (multiplayer constraint ) who helps you rotating the spheres in Ahnonay -- no lever in the stone tower, sorry.
The lever in the maintenance area in Ahnonay is always powered up, but in most cases it has nothing to do, unless... (no spoiler)
If you are not familiar how the puzzle in Ahnonay works and you are not patient enough to work out this hard nearly impossible task by yourself, there are enough walkthroughs out there. Here is one of the most detailed ones: Guild of Greeters - Ahnonay — Walkthrough

Have fun!