If using wget (which is really a text based web page 'getter' and according to one of the main developers of Moodle is supposed to be 'depreciated'), one has to use a **url** site not path.
https://onlinelearning.sassystirrers.com/admin/cron.php
can't use the one in /cli/ as that is for command line only execution.
Really best to find php-cli for version of PHP desired and execute thusly:
/path/to/ea-php73/bin/php /full/path/to/account/public_html/admin/cli/php.cron
Above may be in-correct as to directory for ea-php73 as I don't host on SiteGround ... educated guess?!!
Easy Apache allow you to choose which version of PHP to run and each version of PHP is some directory ... **like** (example ... do NOT copy and paste):
/usr/bin/eaphp71/
/usr/bin/eaphp72/
/usr/bin/eaphp73/
php-cli might be in a bin directory above.
Guess: /usr/bin/eaphp73/bin/
php-cli is command line ... and the way to discover which php-cli to use in cron job, normally done via ssh into account and issuing:
which php [enter]
That command **might** respond thusly:
/usr/bin/php
But that might be the lowest version of PHP on system and not the desired version. To find out, use full path as shown above and check version:
/usr/bin/php -v
Response from that will show showing like:
PHP 7.2.34 (cli) (built: Oct 1 2020 13:37:37) ( NTS )
Note it shows the version and that it's the cli (cli) above.
Surprised SiteGround help desk cannot assist with this. You might need to ask them what is the full path to easy apache version desired and the location of php-cli (command line executable)
Login to the moodle and go to site Admin Server PHP info.
In a line for Response headers one should see X-Powered and the version of your Easy Apache.
Other clues as to location ... paths to php.ini being used ... and scan this directory path.
'SoS', Ken