Welcome to the Roku Community and thanks for posting regarding issues trying to screen mirror to your Roku device.
We would recommend taking a look at the information provided for the screen mirroring process and troubleshooting steps on our Support page here: Screen mirror your Android or Windows device
Please keep us posted what you find out and we will be more than happy to continue assisting should you need further assistance. We look forward to hearing back from you.
Roku Community Moderator