The URL could not be validated. Either the page does not exist or the server cound no

When submitting my sites to free web directories I got this error

The URL could not be validated. Either the page does not exist or the server cound not be contacted.

I tried to submit to 40 different directories but same error I got.

Anyone who could help me?

Is submitting site starting https:// is an issue?

Cron fails because update folder does not exist

I am trying to setup cron for a magento 2 installation made through composer.

I have tried to manually add the following to my crontab:

* * * * * www-data php /path/to/m2/bin/magento cron:run | grep -v "Ran jobs by schedule" >> /path/to/m2/var/log/magento.cron.log * * * * * www-data php /path/to/m2/update/cron.php >> /path/to/m2/var/log/update.cron.log * * * * * www-data php /path/to/m2/bin/magento setup:cron:run >> /path/to/m2/var/log/setup.cron.log 

If I then check the /path/to/m2/var/log/update.cron.log I can see the following message:

Could not open input file: /path/to/m2/update/cron.php

Obviously, because the folder /path/to/m2/update does not exist.

I am not sure why the folder and cron.php file is missing. Is there some bin/magento command that I have missed?