TestFlight download 95% of the application and stop

Hi

I used TestFlight to share beta with internal testers. The build sent that I can install was at Nov 25, 2015 4:31 PM. After that the new builds was accepted by Apple but if I try to install on iPhone Testflight download ~95% of the application and stop. The only message that I have is "Could not install <app name>, Your request couldn't be completed. Try again.". I tried several times nothing changed.Is anyone has had the pb? Is there a solution?

Regards
Tof