Copy failed. ALAssetsGroup failed to add asset: (null). Please allow access in settings

After installing iOS 11.2.5 beta 2 in my iPhone 7 Plus. I am not able to copy the photos, by Wifi, from my camera Samsung NX1, using the Samsung Camera Manager application, version 1.0.7. This application worked normally before on iOS 11.2.1 and after migrating to iOS beta it gave the following error message:

"Copy failed. ALAssetsGroup failed to add asset: (null). Please allow access in settings"

After that, I restored iOS to the stable version (11.2.1) and the error continues.

Could you help me? Please!

Copy failed. ALAssetsGroup failed to add asset: (null). Please allow access in settings
 
 
Q