Issue description: Some Trainers are unable to open Poké Lid Gifts that contain GO Stamps.
The Open button may not respond, preventing the gift from being opened and the stamp from being collected.

Status: Investigating

Note:
Once this issue is fixed, gifts will open normally.
If you do not need to receive Poké Lid Stamps, you can temporarily turn off:
Settings > General > Receive Poké Lid Stamps from Gifts
This will allow you to open gifts without collecting stamps.