Seems they are having issues with some of their shipping label integrations, there is an incident logged on their status page: https://www.shopifystatus.com/
not much we can do except wait for updates for it to be fixed…
Topic summary
Multiple merchants report being unable to purchase/print shipping labels, receiving errors like “There was a problem buying shipping labels,” “Something went wrong, please try again,” server timeouts, and a USPS-specific error banner. The issue affected both USPS and UPS, across web and mobile, and occurred intermittently (sometimes one label prints, the next fails).
Standard troubleshooting (clearing cache/cookies, multiple browsers/devices, updated software) did not resolve it. One merchant noted a label printed with a valid USPS tracking number but did not appear in the order timeline and couldn’t be voided, raising fulfillment tracking concerns.
Support acknowledged a known issue affecting a limited number of merchants; initially no status-page update, later an incident appeared on the status page. A suggested workaround was to buy labels directly on USPS/UPS sites and then manually fulfill orders by entering tracking.
Latest update: Shopify Community reports the issue impacting purchasing shipping labels with insurance has been resolved. If problems persist, merchants are advised to clear cache before logging in or open a new topic with detailed information. The thread concludes with a resolution, though users experiencing lingering issues may still need to follow up.