I have been trying to open a replay file for the past 20 minutes which I just flew, (note it is a 13 hour flight, but I haven’t had this issue with any other ultra long haul flight replay in the past) In terms of troubleshooting, I have tried closing the app and restarting my device already.
Hey, maybe the replay file is corrupted. You could try to share it, so that we can check if it loads on one of our devices. The best way to share it would be to upload it here. https://sharemyinfiniteflight.com/
Hope this helps :)