Thanks for coming back to us on this one.
The first thing to check is that your TiVo box is fully connected to the network. If this is already the case, make sure the app you're using and the OS of your device is fully up to date.
Once you've done these checks, can you have a look at the CPE IP address on the app? We need to check if this displays a valid IP address show up or if it show's up as unknown? To check this, click on your profile icon at the top > Settings > Diagnostics > CPE IP.
If it's showing as unknown, then click the icon next to the search bar in the top right corner and disconnect from your TiVo box and reconnect. This is a workaround that our VIP user Ernie has let us know of and it should refresh things and allow an IP to be registered. Hopefully you will then be able to watch the recordings without any issues.
Please pop back and let us know how things go.