Sometimes you are getting an error message when you are entering Roku link code. This error may occur due to the following reasons:

Check if this is a typing error or not. Maybe the code you entered is not correct.
Maybe there is a network issue in your system.
It is also happened due to network or system error.
Last, press the * button on Roku remote to get fresh code.

If the issue still occurs then call +1-866-819-3021