I'm able to add the preorder to my cart, but opening my cart then gives me a notice that items in my cart have changed.

Eager to preorder the module once this is sorted out.

Worked later in the day.

Same. Also not seeing my Legendary Bundle Discount working on this book in the Market Place.

Yep, just tried ordering and it vanished from the cart, lol

also not sticking to the Cart for me.  And yes, the discount that should be there is not.  Hoping it's resolved as I tend to order once available so i don't forget.

I was getting this too a little bit ago but it seems to be working now, i was just able to pre-order, with the discount showing, a minute ago.

Same issue here as well

nvm fixed 

I haven't done a preorder before; when are the codes redeemable for DnD beyond access when you purchase the digital+physical bundle? Is it on/after the projected product release date, or can we redeem the code immediately after purchase and wait for it to be implemented in the future?

Should be able to redeem immediately after purchase. 

Is there a time frame that I may need to wait in order to utilize the code? Upon attempting to enter it, DnDBeyond is stating the code I'm using to redeem is not valid. I figured perhaps it was just something I had to wait for, but now I'm curious if I should escalate this to the support team.

EDIT: Nevermind, I did a silly thing. I hadn't noticed there was a space at the front of the code when I attempted to redeem it. I deleted the errant space and the code successfully went through.

I tried to order It but it says "order not validated, try later" but it doesn't change since three or four days, any ideas?