[2019] input not supported

What resolution is your screen?

Please head to the GameSettings file, which should be located here:

• C:\Users\\Documents\My Games\Rainbow Six - Siege\\GameSettings.ini​​

Open this file in Notepad and try setting the Resolution line to your native desktop resolution, save it and try to open the game again.

- Ubisoft Customer Support

Were you able to resolve the issue with those steps?

- Ubisoft Customer Support