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Small and medium business | Business Central, N...
Suggested Answer

HttpClient.Send immediately fails after upgrade to OnPrem 27.4

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Posted on by 76
Hi, 

Has anybody had the same problemy yet? After upgrading all our outgoing HttpRequests instantly fail ( not a timeout ) with status 0 . Had to downgrade back to 27.3 where it works.

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  • Suggested answer
    Andrés Arias Profile Picture
    4,588 Super User 2026 Season 1 on at
    Hello,

    Based on the error message, it appears to be an error in the SSL certificate or an authentication issue with the API, or a port block by the firewall.
    You could check if the API works on the web to rule out any issues.
     
    I hope this helps.
     
    Best regards,
     
    Andrés

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