If you have a Community license, it is a free plan that gives you instant access to elementary automation capabilities through licenses for users and UiPath services.
It is aimed at non-commercial use only. For commercial purposes, the Free plan is available.
This plan includes a set number of licenses, of which you cannot request any more. If you need additional licenses, you must upgrade to the Pro plan.
If you will check About licensing, you will see that you will get 2 Automation Developer - Named User licenses.
With Automation Developer - Named User you will have these software capabilities:
Action Center
Apps
Attended Robot
Computer Vision
Data Service
Integration Service
Studio
StudioX
Task Capture
Test Manager User
So in conclusion, make sure that in your Organization in Cloud, you are adding your user in the Automation Developer - Named User license group or you are providing this license directly in the attended robot settings.
Then, after login again in UiPath Assistant and logging to Orchestrator, you will be able to use UiPath Studio.
Let us know if this helped.