Hey @RafaelDeiro That is definitely odd - thanks for getting in touch. Could you please get in touch with our Partner Support team directly on this one (there is a “support menu” that is accessible via the left hand side of your partner dashboard when you’re logged in)?
If you can share an X-Request-ID and a date/time stamp of when the issue with the location mutation occurred with our Partner Support team as well as point to this post here, they can get in touch with one of our technical teams to investigate further as this would likely require some more sensitive store-specific information we’d need to look into this more deeply.
One other thing to confirm if you can when you send that email out is if your app has write_locations permissions via your available access scopes (info on how to check available app scopes on a specific shop here). Generally, we would return a different error if this is the case and fulfillment apps are automatically granted this scope, but I just want to make sure we’ve covered everything before we escalate to one of our teams internally to investigate.
Hope to hear from you that way soon - once we’ve looked into this I am happy to post back here with an update for anyone else who may encounter this in the future.
Al | Shopify Developer Support