I am helping a field staff colleague troubleshoot a problem with syncing in Collector. She is running Collector on an Android device (Samsung S5). She has tried to sync while connected to WiFi and LTE (with data syncing enabled) without success. I, and several other staff members, are able to sync from our mobile devices without issues. I have attached a screenshot of the error message she keeps getting. There are a few clues in it, but I'm not sure exactly what the issue is. I would appreciate any suggestions about why this might be happening.