Auto posting and reposter have stopped functioning

Both my auto poster (on article publish) and reposter are no longer working as of three days ago.

1) Cron is being run from my server as opposed to WP – and is working fine according to your cron test link.
2) SSL/HTTPS tests also look good
3) Manual posting using the buttons on post edit pages works fine.
4) The most recent two posts as shown on the SNAP Query page are listed as “scheduled” but have not executed

Interestingly the reposter config page shows this:

Total Posts: 915 | Posted: 80 | Next post will be ~ 2017-12-04 11:02 | Current WordPress Time: 2017-12-07 04:36

Note the time difference!

Any suggestions?