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PHP Warning: DOMNode::cloneNode(): ID invoice already defined

Posted: September 29, 2016 at 12:42 pm

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webierweb

September 29, 2016 at 12:42 pm

We seem to be having a caching issue. W3TC is deactivated.

This is the warning I have seen in logs for redzonegames.com

Please help as it is breaking the checkout process and this business is going to be busy over the weekend.


Josh

  • Support Staff

September 29, 2016 at 1:06 pm

The warning you posted as the title of this thread would not be related to caching, that’s actually something related to your server setup, and would happen when someone downloads a PDF invoice.

If you suspect you have a caching issue, the solution is never going to be deactivate W3TC. Instead, what you’ll need to do is reactivate W3TC, then go through its settings and deactivate each caching option (typically database caching and object caching are what cause the trouble).

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