If you are experiencing problems, check you are using the most recent release of both CrossCountry App (or Lite) and upgrade to the latest iOS if you can. Tell us what release you are using. We officially support the three most recent major releases of iOS i.e iOS10, iOS11 & iOS12
Before you upgrade to a new release of iOS restart your iPhone/iPad so that there are no processes hanging around which can cause the upgrade to fail. This is not related to CrossCountry app but is an important Apple tip.