Sling does not support the following Roku streaming device models: 2450X, 2500X, 2400X, 3000X, 3050X, 3100X, 3400X, 3420X, 2700X, 2710X, 2720X
You can check your Roku model number via Roku menu path Settings > System > About. Note that the letters at the end of the model number only designate the distribution chain through which the Roku was released, so yours may show something other than an X.
Roku Community Streaming Expert I am not a Roku employee, only a user like you. Please, no support questions via private message -- post them publicly to the Community where others may benefit as well. If this post solves your problem please help others find this answer by clicking "Accept as Solution.".
Streaming Stick 4K+ 3821 | Streaming Stick+ 3810 | TCL Roku TV 43S245/C107X