Thanks for getting in touch with us here at Roku.
We recommend restarting your Roku TV, Go to Settings > System > Power > System restart > Restart and unplug your TV for 10-15 minutes then plug it back in to resolve the issue. If the issue still persists, we would recommend you contact the TV manufacturer for the issue. Each Roku TV manufacturer provides direct support for their products running the Roku OS.
Here is the contact information for TCL support: https://support.tclusa.com/televisions or at 1-877-300-8837.