Hi Michael,
Great, glad you got it working! 🙂
I would think that it was only caused by the major version upgrade to be honest – would be a bit rubbish if you were forced to do that on every upgrade, as it would negate an advantage of being able to override the existing templates!!!
Cheers,
Rik
Don’t know if you’ve solved your issue or not, but I just had the same problem.
Basically my problem was caused by the email templates in the woocommerce folder in my theme. I had updated woocommerce, but not updated these templates. I deleted these email templates from my theme and all started working again.
I hope this helps someone with the same problem
Thanks,
Rik
