The send warned me: 'X of Y photos could not be found on this device'

This warning is the app's pre-flight check being honest with you before it builds anything. Every send starts by locating the actual image file for every photo recorded against the plot; any that cannot be found on this phone would be silently absent from the report and the photo archive, so the app stops and asks first.

What the messages mean

• "[X] of [Y] photos could not be found on this device and will NOT be included in the report PDF or the photo archive. Send anyway with what was found?" — most photos resolved, some did not. Nothing has been generated or uploaded at this point. Cancel is completely safe: no report, no upload, and the previously sent archive (if any) is untouched. Send anyway builds the report and archive from the photos that were found.
• "No photos found on this device" — none of the plot's photos resolved. The app refuses outright: nothing is sent, and anything previously sent stays exactly as it was. This is almost always the second-device case below.
• The same check runs when re-sending a saved PDF from the Reports page, phrased for that case: the saved PDF "may not include them".

Why it happens

1. You are on a different device from the one that took the photos. This is by far the most common cause. Photos live only on the capturing phone — they do not sync between devices, by design. Signing in on a new or second phone brings your project records but not the image files. Send from the phone that captured them, or migrate properly (see the moving-to-a-new-iphone / moving-to-a-new-android articles).
2. The app's data was cleared or the app was reinstalled at some point — the records survived in the cloud, the files did not.
3. Some photo files were individually removed (for example a partial migration, or a cleanup tool interfering with app storage).

One thing to understand before "Send anyway"

The photo archive for a plot is stored in one place, and a new upload replaces the previously sent archive for that plot. If an earlier send delivered the complete photo set and you now send a partial one, the assessor's downloadable archive becomes the partial set, and so does the report: the new send replaces it, and the link in your email, the portal and the app all open the new version. Only copies they have already downloaded are unaffected. The app's refusal to upload an empty archive exists precisely to protect the complete one — and it is also a good reason not to casually send a heavily partial archive over a complete one. When in doubt, cancel and get the missing photos found first.

What to do

• Expected it (second device, known clear-out): send from the capturing device if it still exists; otherwise recover what you can (gallery copies, previous sends — see lost-or-broken-phone) and re-import before sending.
• Did not expect it: this is the phone that took the photos and they should be here. Cancel the send, change nothing, and do not uninstall, reinstall, or clear anything. Then read photos-disappeared and contact support — choose "Evidence at risk on site" if a deadline is at risk. The photo records still exist, which is exactly what support needs to help you recover.