Hi - please take a look at the Design Studio 1.4 PAM / product availability matrix at https://websmp108.sap-ag.de/~sapidb/012002523100018972812014E
I interpret this to mean you need to be at HANA SPS9, and you are on 6, hence on the surface the version of HANA you are using may not be supported with Design Studio (my interpretation)
Tammy