Wrong variable is used in the URI in SOL003/VNFPackageManagement-API/VNFPackageArtifacts.robot
In Line 62 the variable related to the vnfPackage id should be ${onboardingStateVnfPkgId} not ${erroneousVnfPkgId}
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information