I found out that from 14 july the iCal link for one room disappeared. When I created a new link I noticed that the structure of the link had changed so I think that the changed something that caused this problem. Check if the links still exist.
this booking number was for a stay on 5/18 for 1 night for 2 rooms, there is some type of payment error, that very well could be on the hotel's part, I needed
I am not sure if it working or not but if its any consolation i got it to work one way but not the other, probably way beyond my pay grade :)
I found out that from 14 july the iCal link for one room disappeared. When I created a new link I noticed that the structure of the link had changed so I think that the changed something that caused this problem. Check if the links still exist.