Hello and thank you for reporting this issue.
I have escalated it to our developers.
When I have more information, I will let you know.
I just found a quick fix for those who don’t mind getting their hands dirty.
In class-wcml-rest-api-support.php line 22, change
add_action( 'woocommerce_rest_prepare_product', array( $this, 'append_product_language_and_translations' ) );
to
add_action( 'woocommerce_rest_prepare_product_object', array( $this, 'append_product_language_and_translations' ) );
API v2 added ‘_object’ to the filter name in class-wc-rest-products-controller.php, line 175
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This reply was modified 9 years ago by
spik3s. Reason: Found a possible solution
We released a new release where the issue should be resolved.
Please do a test and let us know if the issue persists.
Please remember to backup your database and files first before you proceed! You can use a plugin for this if you like (example: http://wordpress.org/plugins/duplicator/)