Setting up a Cron Job to call wp-cron

I have a wordpress website running a LearnDash with the Notifications Add-on. LearnDash recommends a Cron Job to manage this process because the native Wordpress mail setup isn’t sufficient. Here’s an article from LearnDash explaining this.

I followed this article to set up a cron job but it doesn’t seem to be working.

Any ideas why?

Here is my crontab after following the steps and running crontab -l:

# Edit this file to introduce tasks to be run by cron.
# 
# Each task to run has to be defined through a single line
# indicating with different fields when the task will be run
# and what command to run for the task
# 
# To define the time you can provide concrete values for
# minute (m), hour (h), day of month (dom), month (mon),
# and day of week (dow) or use '*' in these fields (for 'any').# 
# Notice that tasks will be started based on the cron's system
# daemon's notion of time and timezones.
# 
# Output of the crontab jobs (including errors) is sent through
# email to the user the crontab file belongs to (unless redirected).
# 
# For example, you can run a backup of all your user accounts
# at 5 a.m every week with:
# 0 5 * * 1 tar -zcf /var/backups/home.tgz /home/
# 
# For more information see the manual pages of crontab(5) and cron(8)
# 
# m h  dom mon dow   command

* * * * * wget -q -O - 'https://puredesire.org/wp-cron.php?doing_wp_cron&cron=true'