USPS Mail Error

-- HikaShop version -- : 6.1.0
-- Joomla version -- : 5.4.4
-- PHP version -- : 8.2
-- Error-message(debug-mod must be tuned on) -- : USPS shipping warehouse not working. Following era: USPS (PRIORITY) error: 80040B1A Authorization failure. Perhaps username and/or password is incorrect.
USPS (MEDIA) error: 80040B1A Authorization failure. Perhaps username and/or password is incorrect.
USPS (EXPRESS) error: 80040B1A Authorization failure. Perhaps username and/or password is incorrect.
USPS (GROUND ADVANTAGE) error: 80040B1A Authorization failure. Perhaps username and/or password is incorrect.
USPS (RETAIL GROUND) error: 80040B1A Authorization failure. Perhaps username and/or password is incorrect.

I have had my USPS account connected to hikashop for years now I am receiving the following error ( no thing has change on my part):
USPS (PRIORITY) error: 80040B1A Authorization failure. Perhaps username and/or password is incorrect.
USPS (MEDIA) error: 80040B1A Authorization failure. Perhaps username and/or password is incorrect.
USPS (EXPRESS) error: 80040B1A Authorization failure. Perhaps username and/or password is incorrect.
USPS (GROUND ADVANTAGE) error: 80040B1A Authorization failure. Perhaps username and/or password is incorrect.
USPS (RETAIL GROUND) error: 80040B1A Authorization failure. Perhaps username and/or password is incorrect.

Hi,

USPS decided to retire their Web Tools API last year:

Web Tools APIs Retired January 25, 2026
Migrate NOW to USPS APIs
The USPS Web Tools API platform was retired on January 25, 2026 and service disruptions are underway. Platform support is sunsetting and availability may be degraded or interrupted at any time. To avoid service disruptions, migrate now to the new USPS APIs. The functional equivalents of the Web Tools APIs are now available in the USPS API Catalog: USPS APIs Developer Portal.

www.usps.com/business/web-tools-apis/

Of course, the new API is completely different from the previous one. So a whole new plugin needed to be developed last year for this new API. Thus, we worked hard on this and it's been more than 9 months that we released a new plugin for USPS with regular updates to it since then based on the feedback of merchants migrating ahead of the API termination :
www.hikashop.com/marketplace/product/290-usps.html
If you're using the old plugin, you'll have to migrate to the new one to be able to continue connecting your HikaShop with USPS.