Wrong method in Keywords 'GET Scale vnfInstance' SOL003 VNFLifecycleManagement-API v2.6.1
In Keywords GET Scale vnfInstance Post ${apiRoot}/${apiName}/${apiVersion}/vnf_instances/${vnfInstanceId}/scale
should be GET ${apiRoot}/${apiName}/${apiVersion}/vnf_instances/${vnfInstanceId}/scale and no body is needed
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information