I'd like to take this opportunity to welcome you to the forums and say that I'm really sorry to hear that you've been getting this error message on your TiVo®.
I've done some investigations from my end and saw an issue, so I sent some signals to your TiVo® in order to refresh everything. This may take up to 24 hours to complete, but will normally be a lot quicker. Should you still be experiencing this issue after the 24 hours have passed, please let me know.
This type of fault is normally caused by the TiVo® being powered off for some time, or a prolonged loss of signal. So it's always best to leave the power on so the box can get regular updates.