Some Emails Not Sending

My contact form works, test emails works, and when I send out invoices, it sends the emails...

However if I try to send out an email through the site for a gallery or something, it gets stuck. It shows that it's in the queue to be sent, but never goes out. Any thoughts?

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https://www.picturespro.com/sytist-manual/common-issues/emails-not-sending-or-going-into-spam-folders/

Gallery invite emails are not sending but order emails and others are

This can happen if you have enable Automated Emails but the cron job on the server to make it work is not set up correctly or not working. You can go to Settings -> Automated Emails and it will show if there are pending emails. If so then this is the issue. You will either need to disable automated emails or set up the cron job on the server correctly.

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