Configuring a web server is outside the scope of support we can provide. The community of web hosts here may be able to help you with that, but it sounds like you might be better off getting your hosting from a web hosting company.
If it helps anyone, my cron jobs stopped running after updating Blesta. (My server is using Plesk)
I was using:
/usr/bin/php /home_dir/user_dir/public_html/blesta/index.php cron
I am now switched to curl instead:
curl -L --max-redirs 1000 -v "https://yourdomain.com/blesta_dir/cron/?cron_key=your_cron_key" 1>/dev/null 2>/dev/null
regards
Trevor
## Update ##
Curl is a bit fussy about who issued the server certificate so if the above doesn't work try:
curl -L -k --max-redirs 1000 -v "https://yourdomain.com/blesta_dir/cron/?cron_key=your_cron_key" 1>/dev/null 2>/dev/null
Another option would be a link that pops up a window with the original/suggested template contents, so that you can review it and then copy some or all of it as needed. This way, you don't have to completely wipe out your current template in order to cherry pick a few lines from the original template.