@jlx89 After you restart the app, in the app logs you should see
==> Imported crontab. It will also print an error if it could not parse the crontab correctly.
For testing, you can put something like this in your crontab:
* * * * * echo "Cron ran at $(date)" >> /app/data/test.txt
Then, after a couple of minutes, I can see in
Cron ran at Thu 29 Jul 2021 10:19:01 PM UTC Cron ran at Thu 29 Jul 2021 10:20:01 PM UTC
If the output above does not appear for some reason, maybe you can
systemctl restart box and wait for sometime to see if that helps.