So as the trace is saying did you give "Grant" option? And hence you are able to preview the data in HANA. It means:
1) You are able to see the package from "myUser"
2) You were able to do data preview from HANA on the analytic view
Right?
If it is "myUser" who created the tables, then i don't think you need to grant again.
I was mentioning you to grant SYS_BI (SELECT) ,_SYS (SELECT) to "myUser"
And after all this your issue currently is "myUser" cant see the views in Design studio? Could you confirm that you are logging into Design studio using "myUser"?
Regards,
Krishna Tangudu