Verify a chained mission was not attempted which will reduce chances of success.
Ensure storage location is set to SD card and not onboard storage for the drone.
Use a higher area per image setting for the stand assessment plan if possible to give more time between photo capture locations.
Slow down the capture speed in advanced settings to give more time between photo capture locations.
There is a likelihood that the DJI SDK was locked up causing missed images. Your drone and controller must be power cycled before trying again. Once power cycled, we would also recommend force closing the DroneDeploy app and reopening.