Sorry, my mistake, I assumed you haven't contacted support and just glanced through the initial post.
Check in your database when was the last time your cron run, also try to investigate the issue with your hosting support why cron is not working.
Your log is in RTF format and almost 70 MB in size! Try to use ordinary text format in the future, and try to limit it to smaller chunks (e.g. 1-10MB max), as this is really hard to examine in any meaningful way in a short time.
All I can see are some notices from your theme, so nothing PHP-related re plugin happens. Could be the cron is not running, check some other related forum topics for troubleshooting tips.
Regards
dev101