Code=513 couldn’t be copied because you don’t have permission to access “Group Containers”."

I am working on a macOS application in sandbox mode. I have enabled App groups and I can see the app group folder gets created. I am attempting to move a file from the app directory to the shared group but im see a permission error.

Code Block 
Error moving files Error Domain=NSCocoaErrorDomain Code=513 "“Container_1595437210.503603.txt” couldn’t be copied because you don’t have permission to access “Group Containers”."

Any ideas?