The bot fails on a Sunday, yeah? Bot boss ( can't remember who it is) have you double checked whether the days of the week count should be 0-6 or 1-7? POSIX time (e.g. if you have a cronjob set up) is 0-6 where sunday is 0.
Just a thought (and thanks for the Bot in the first place).
It's not consistant in failing on Sunday, and it has posted the thread in the Food Community today with no problems. It does seen to fail more often on a weekend, either Saturday or Sunday but I have no idea why.
Once I have finished today's assignments I will have a bit more time and hope to get some new programming sorted. And possibly rescind the bot's work from home priviledges, maybe it will not slack off if it has a structured office environment.