Checkout and Order endpoints returning not found (404) errors

Hi,

This was working some time ago, but I now found out it isn’t anymore.

Basically it’s possible to complete an order throughout but after confirming the order (in this case without payment verification) the “order-received” endpoint is not found. I’m using WPML but disabled it and it stayed the same.

The url sent after confirmation is this one, returning 404:
https://mydomain.com/store/checkout/order-received/3434?key=wc_order_5737506029cba

I’ve checked this article but it’s apparently all as it should be:
https://docs.woothemes.com/document/woocommerce-endpoints-2-1/

The same goes for “view order” in the account pages.

I’ve also went to WordPress > Settings > Permalinks and updated everything again.

I’m really lost here. :/

Thanks

Screenshots:

View post on imgur.com