System Information
Operating system: Window 10 home
Graphics card: Geforce GTX 1050 4GB

Blender Version
Broken: (Blender 2.90.1)
Worked: (don't know)

Actually it may not be a problem of Blender (So, I apologize for that)
When I try to render with Radeon Prorender's hybrid render quality, the System console shows the following error:

2020-09-30 22:43:03,651 INFO rpr.utils.user_settings [4764]: Automatic save user preferences...
Writing userprefs: 'C:\Users\Mukul Das\AppData\Roaming\Blender Foundation\Blender\2.90\config\userpref.blend' ok
2020-09-30 22:43:03,657 INFO rpr.utils.user_settings [4764]: Automatic save user preferences...
Writing userprefs: 'C:\Users\Mukul Das\AppData\Roaming\Blender Foundation\Blender\2.90\config\userpref.blend' ok

I think Blender is saving the preferences instead of rendering the scene. I think the problem is with the code of their software, but I am not sure.
Please tell me where is the problem...

Exact steps for others to reproduce the error
Open blender
Render the viewport scene with the High, Medium or Low quality using AMD Radeon ProRender version 2.5.1 or 2.5.7 or 2.5.14