Looking at the logs its just issues with connecting to the tuner now. It either doesn't respond with any data or the data is corrupted. Maybe a signal problem or aerial problem? Do you have the HDHomeRun app? Can you view live programs with it? When you are watching something or recording something you can view the tuner status at
http://hdhomerun/tuners.html by selecting the in use tuner and it will tell you about the signal quality. Is the computer you are using connected via a wired Ethernet connection?
Not sure there is much more I can help with if the tuner isn't responding with valid data.