Problem calling app *** on appstore from app YYY on BtoB

Problem calling app *** on appstore from app YYY on BtoB. Has worked previously where app *** and YYY both were on appstore. Is this a problem? We get the error: "The URL can not be shown". We call app *** with the following URL schema: ***: / url / zplcode? x-success = YYY: / app ***. Why does this no longer work?
It works then we call the *** app directly from Safari with the same URL.
We believe that the problem has occurred at the end of the year in 2016