Well, we'll need to know if @bate setup your certs via the Wiki or with the builtin installer, which I bet he used the builtin. Interesting there is nothing in your crontab as it is added by the installer, I just ran a test and it adds. You can add the cron by running the command below:
line="30 2 * * 1 "~/acme.sh"/acme.sh --cron --home "~/acme.sh" > /dev/null"
(crontab -u root -l; echo "$line" ) | crontab -u root -