Thanks for the post.
Have you tried unplugging your TV for 10-15 minutes and then plugging it back in to see if the issue is resolved?
In addition, have you tried contacting TCL support yet to inquire further? I'd suggest starting there to see what options or suggestions they can provide. Each Roku TV manufacturer provides direct support for their products running the Roku OS.
You can reach them here: https://support.tclusa.com/televisions or at 1-877-300-8837.
Please keep us posted what you find out.
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