This is once again become an issue this year. I see others mentioning it too.
So its not my DNS or internet failing.
can you investigate silicondust team?
Old ref:
https://www.reddit.com/r/hdhomerun/comments/1ne9350/myhdhomerun_sync_webclient_error_early_close/
Source: r/hdhomerun · by /u/wazernet