On this page we give you some information in case things do not work as planned.
You cannot open a preview on your phone or tablet?
Most likely it is the Pop-up blocker... You can deactivate it on your device and the popups should work nicely.
You cannot upload your GTFS data?
Most likely there is something wrong with your data. Please make sure you validate your GTFS data in case you cannot upload it to the navigator.
You experience any other issue when using Navigator?
Please go to our website and report your issue