Using `sq -p offline ...` results in unhelpful error messages
$ sq -p offline store add 'justus' 'CBCD 8F03 0588 653E EDD7 E265 9B7D D433 F254 904A' Failed to open the store: Unmet network policy requirement: Encrypted
I think we can better explain what is going on.
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information