tt-rss git v17.4 (6c34ef6), debian 7.11, postgres, php 5.4.45
Finally tried updating from 15.7, but now I get the following when I try to update the feeds via ./update.php --feeds
PHP Fatal error: Call to undefined method Digest::send_headlines_digests() in /var/www/.../tt-rss/classes/rssutils.php on line 215
Everything else (at least access to my feeds) seems to work just fine, just not updating at this point.
Please let me know if I can provide any more detailed information to help narrow down the issue.