Hi,
I have modified many order status according to my shop needs, the order statu triggering the error is the one with ID 18 that for me is "Invoice", it has the flag delivery and invoice turned on.
1. The reason is simple, when the order has been created, the variant of the product existed. The variant has been deleted after because I dont sell that variant anymore.
2. The order status was "Shipped" (id 12) and i changed it to "Invoice" (id 18)
3. Probably it is some code that is triggered in this specific case, unfortunately i can't find any log with any error except the red banner showing what i posted. The fact that the error still exist even when i disable all the override and all the non native module, have me thinking that is something related to prestashop core and not some module. It would be nice to try to reproduce the error on a fresh install to see if it happen. I will try it as soon as i have some time.
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