Leica BLK360 FAQ
Ensure that the scanner is still connected Wi-Fi. You may also need to reset the Leica BLK360 by turning it off by pressing and holding its power button until it shuts off. Turn it back on and try connecting again.
In some cases, scan data can be corrupted, you may isolate this by trying to manually transferring scan files one at a time until you have isolated the problematic file.
The iPad can sometimes not handle large projects well either, if you think this is the case, try a new project. You can also use the desktop version on the processing laptop to handle larger datasets.