Ionic native Document Viewer Problem


I am using now ionic file transfer to download a pdf and then open it with document viewer.
When i strat it with ionic serve -c and try in ionic DevApp on my iPhone it works well

When push it to git, and view in ionic view on my iPhone, it does not work. Nothing happens.

Do you have any idea how to solve this? Or at least how to get error from ionic view?

Thank you