Welcome to the not so wonderful part of being a Wyndham owner. This is something that happens so don't worry. Your reservations aren't lost or cancelled. Hopefully by tomorrow morning you should be able to once again see your reservations.
As @CO skier
posted its about guaranteed that the upcoming major update is going to be a s..tshow.
**The day before it's scheduled make very sure you take screenshots or pictures with your phone of your point balances and all your reservations. I do this sometime during the day on December 31st also. There must have been a reason one year and now I do it every year. It's a good idea to have your starting point balance is you ever think there's a discrepancy later in the year.
Some people keep the screenshots or pictures of all their reservations in a file. That's something I wish I had been doing. There's been a number of times I've wanted to know when we stayed at a resort or what size or type of unit we had.