DB2 on Docker :: IBM Data Studio prompts error when creating new database

I've followed this simple guide and I was able to install DB2 on Docker. I now would like to import a sample database to play with. So I open IBM Data Studio, I right click on the instance > New database... , I fill up with my user name and password but then an error appears: > The system cannot verify the instance that you specified. Either enter > a valid instance name or click on the button next to the Instance name > field and select one from the list. > com.ibm.datatools.adm.explorer.ui.model.InstanceException: An internal > error occurred during: "Verifying instance db2inst1 in system > 192.168.1.44.". If I expand the error for more details I see: > 'Verifying instance db2inst1 in system 192.168.1.44.' has encountered > a problem. > > An internal error occurred during: "Verifying instance db2inst1 in > system 192.168.1.44.". > > An internal error occurred during: "Verifying instance db2inst1 in > system 192.168.1.44.". > > com.ibm.db2.das.core.DasMessageIdentifier (initialization failure) A dive in the official documentation brings me to this solution but I don't think that could be the problem. What intrigues me is the 'dot' (.) after the IP address. Could this be the error? Or is there any other way to import a sample database from IBM Data Studio?