Hi,
That warning message causes UpdraftPlus not able to create or complete backups. UpdraftPlus is only able to run when WordPress is loaded into memory, i.e. when the site is accessed. As such, UpdraftPlus is not able to resume the backups in good time.
I would recommend looking into this guide, which includes several suggestions to solutions and workarounds for the low visitor issue: https://updraftplus.com/faqs/why-am-i-getting-warnings-about-my-site-not-having-enough-visitors/
Also could you try to reduce the backup archive split size. This will split the backup into smaller, more manageable files.
To do this, open the ‘expert settings’ section of the UpdraftPlus Settings tab, and find the ‘split backups every’ option. Set this to 50Mb save your settings and run a new process.
If the issue persists, please ask your hosts/server admin to investigate their PHP error logs. These logs should contain more information on the exact issue that is causing the backup process to halt.
Regards,
Bryle
