PDF Invoices Not Attaching to Emails

It seems the document hasn’t been created from that error. Do you have any SMTP plugins active, or any other invoicing plugins active?

Hello,

Thank you for your response. I apologize for the delayed reply, as your message was mistakenly filtered into my spam folder.

I am currently using the WP Mail SMTP plugin, but I do not have any other invoicing plugins installed. However, I do have a subscription manager plugin that generates an order for subscribers each month. This particular plugin hasn’t been updated in a while, unlike the rest of my plugins, theme, and WordPress core, which are all consistently updated on time.

It’s important to note that PDF invoices are always generated and attached to the corresponding orders. The core issue lies in the fact that these PDF invoices are not being attached to the emails sent to both the administrator and clients, except when an invoice with a total of €0 is generated. In those cases, the PDF invoice is successfully attached to the emails.

The WP Mail SMTP plugin does not report any errors.

Thank you for your help.

Are the orders with 0 Euros subscription orders as well? If not, are the orders that don’t have the attachments all subscriptions? Under PDF Invoices > Documents > Invoice > Attach to, are there attachment options for the subscriptions?

Indeed, orders at zero euros are also monthly subscriptions. The vast majority of payments on our site are subscriptions. I must admit that I have not tested a one-time payment other than the subscription due to timing reasons, as the website is currently in production.

Additionally, PDFs are configured to be attached to all subscription or standard order emails. However, the settings have remained unchanged for nearly three years, so it would be surprising if there were any malfunctions at this level. Moreover, the subscription tool generates new “traditional” WooCommerce orders, so the customer receives the standard WooCommerce emails as if they were making a new order on our site each month, except that this process is automated, including the customer’s credit card payment.

You can see the settings screenshot on this image: https://drive.google.com/file/d/1Dpkboo8JoBT4dJvlbAMrrVc-OL1xY_q7/view?usp=sharing

• This reply was modified 3 months ago by digitalpower13.

Apologies for the delayed response. Thanks for the screenshot. This is rather odd. The payment statuses you have in the “Deactivate for” setting don’t appear for any of these orders that don’t have the invoice attached to the email? It seems that these invoices are prevented from being created so there’s nothing to attach to begin with. Can you confirm that the invoices actually exist in these cases but they are just not sent?

So far, you could test deactivating the SMTP plugin to see if it was blocking these email attachments.

Hello,

Thank you for your response. I’d like to clarify that this configuration has been working flawlessly for the past three years. The payment status for each order is typically set to “Processing,” and invoices are consistently created for every order (please see the attached screenshot for reference).

Could the issue be related to the timing of the PDF creation in relation to the email being sent? I’m wondering if there has been any delay introduced in the invoice generation process following a recent update, which might explain the error messages found in the logs. Specifically, the error we’re seeing is:

2024-08-15T09:13:22+00:00 Critical: Couldn’t get the document object for email attachment. Document type: invoice, output format: PDF, email order ID: #37808.

Moreover, I’ve noticed that this error is not consistent. For example, just recently, two invoices (both non-€0) were successfully sent within a few days of each other. Additionally, contrary to my previous message, invoices with a €0 total are no longer being sent either.

I will go ahead and try deactivating the SMTP plugin to see if it has any impact, and I’ll also remove all items from the “Deactivate for” section in the plugin settings. I will keep you updated on the results.

What are your thoughts on this potential timing issue?

Best regards,

Screenshot: https://drive.google.com/file/d/1EAjs7tKdHewcwbYvFs6iW5DlVItvYUso/view?usp=sharing

There is no clear indication of what could be wrong here. Do you have a staging site that we can use to look at this a little further? If so, could you send us an email at [email protected], please?

@digitalpower13

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