We're aware of the issue on Xbox where screenshots taken in Photo Mode may appear in the in-game Gallery as blank. As a workaround, try the following:
- Disable Dolby Vision in your TV settings.
- If it doesn't help:
- Go to Settings → General → TV & display options → Advanced → Video modes.
- Disable Allow HDR10, Auto HDR, Allow Dolby Vision and Dolby Vision for Gaming options and restart the game and console.
- If the above doesn't help:
- Press the Xbox button and go to Profile & System → Settings → Preferences → Capture & Share.
- For Allow game captures, select Captures by me or games, and for Capture save location, select Internal storage.