Including E2 PDF attachment in my email breakes my form

Hello,

I am trying to set up the E2PDF plugin, and I ran into this issue.
If I include only the download shortcode in my fluent forms confirmation email, I get a link, can download the PDF, PDF looks great.
The moment I try to use the attachment shortcode I get this error message under my form.

I can't figure it out, why is this happening, attaching the PDF would be a way better solution for us.

Any help would be greatly appreciated!
Thank you!

Hello,

Unfortunately, we can't replicate the issue on our side. Can you please check the error.log of the website as it must be logged by WordPress there?

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We would really appreciate your feedback at WordPress.org!

Ok, the error log gave me a good clue, I had to increase my site's memory limit, it solved the issue!

Thanks for the quick reply!