B4X FEED ResponseError. Reason: Internal Server Error, Response: Error 500

[practicalsoft]

Hi, my App which has always worked very well by connecting to the "Agenzia delle Entrate" website by sending payments via a signed xml file, has not worked since 21 November 2022 with an error message:
ResponseError. Reason: Internal ServerError, Response:
returning error 500
Do you have any advice for me?
Thanks in advance
Sincerely

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