clmerle

I got the same error message when I tried to activate it as well, but not in a multi-site WP 4.0. I disabled all the plugins and only activated WooCommerce and OpenTickets CE.

@mattyrob

I got lucky on my first try. It was indeed a plugin conflict. It was Social Metrics Pro. Cron Gui lets you see what crons are running but that’s it. I switched to Simple Cron which lets you delete and and cron jobs within WordPress. I found a wb_cron_job, after searching found it belonged to WordBooker which had been installed and removed. I deleted the process, so still had the problem. I’d recommend being very very careful if you are messing with cron jobs in WordPress. I’m not sure how’d you go about restoring them if you deleted the wrong one.

I got the idea of checking cron since to send out the digest S2 calls subscribe2_cron():

if ( 'never' == $this->subscribe2_options['email_freq'] ) {
$post = get_posts('numberposts=1');
$this->publish($post[0], $user_email);
} else {
$this->subscribe2_cron($user_email);
}

I thought that it might be a cron process that is interfering with the Send Preview Email when digest is selected. That narrowed down the number of plugins to try first. I discussed the plugin conflict with the site owner and the first one I mentioned was Social Metrics Pro. He said they didn’t need that one, so I turned it off and tested it. Preview sent. So my suggestion is if Subscribe2 can send emails (verifying it in Email Log) using the Send Email function and For each Post but not Once Hourly, Once Daily, etc, then it is most likely a plugin cron conflict and using a cron monitoring plugin like Simple Cron will help you narrow down the plugin culprit (this site has 27 active plugins).

I’m beginning to suspect a plugin conflict. I tried it on another site and had no problems. I’ve compared the old code from 8.3 with 8.9.1 and I can see no difference. In addition to using the plugin Email Log I’m using Cron Gui to see what cron jobs are set and what plugins are using WordPress’ cron function.

I figured out the problem with the Send Preview Email. If Send Emails is set to Once Daily it says Preview message(s) sent to logged in user but no email is sent (nothing in the email log) If I set Send Emails to For each Post I receive the preview emails. It acts like it’s queuing up the emails to send at a certain time. Since I tried this a bunch yesterday I never received any at the appointed time.

No warnings. It was working the day before the upgrade. I did get the subscribe and unsubscribe working again. I had to choose a new landing page with the shortcodes. It’s only when I try to Send Email Preview that it does not send even though I get the message it sent. I advised my client that I overwrote the paid version of Subscribe2 HTML with the free one and that we need to make sure to get the upgrade (he may have to renew his subscription). Once we have the correct version, I’ll check it again.

Our site is also not able to send emails. It’s using WP 3.5.1 and I just upgraded to S2 8.9.1 from S2 8.3. I installed email-log as suggested. I can send emails from a different plugin for sending emails. Emails are not being sent when I try Send Email Preview. I checked the log. When I try to subscribe from another address, I am not taken to a generated page saying that I’ll get a confirmation email. I have been able to send email to registered users (not subscribers) using the Send Email feature. Before the upgrade people were able to subscribe.