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Suddenly getting this error on my web server , users are not able to access the site

Rajini kanth ~ 0 Reputation points
2024-05-09T03:56:02.4366667+00:00

HTTP Error 500.19 - Internal Server ErrorThe requested page cannot be accessed because the related configuration data for the page is invalid.Most likely causes:

The worker process is unable to read the applicationhost.config or web.config file.

There is malformed XML in the applicationhost.config or web.config file.

The server cannot access the applicationhost.config or web.config file because of incorrect NTFS permissions.

Things you can try:

Look in the event logs for information about why the configuration files are not readable.

Make sure the user identity specified for the application pool, or the authenticated user, has the required permissions to access the web.config file.

Detailed Error Information:

DynamicCompressionModuleModuleDynamicCompressionModuleNotificationSendResponseHandlerExtensionlessUrlHandler-Integrated-4.0Error Code0x8007007e 

http://localhost:80/SummitWebRequested URL[http://localhost:80/SummitWeb]Physical PathC:\inetpub\wwwroot\SummitWeb\WebfilesLogon MethodNot yet determinedLogon UserNot yet determinedHTTP Error 500.19 - Internal Server ErrorThe requested page cannot be accessed because the related configuration data for the page is invalid.Most likely causes:The worker process is unable to read the applicationhost.config or web.config file.There is malformed XML in the applicationhost.config or web.config file.The server cannot access the applicationhost.config or web.config file because of incorrect NTFS permissions.Things you can try:Look in the event logs for information about why the configuration files are not readable.Make sure the user identity specified for the application pool, or the authenticated user, has the required permissions to access the web.config file.Detailed Error Information:Module   DynamicCompressionModuleNotification   SendResponseHandler   ExtensionlessUrlHandler-Integrated-4.0Error Code   0x8007007e Requested URL[http://localhost:80/SummitWeb]Physical Path   C:\inetpub\wwwroot\SummitWeb\WebfilesLogon Method   Not yet determinedLogon User   Not yet determined

Internet Information Services
Windows Server
Windows Server
A family of Microsoft server operating systems that support enterprise-level management, data storage, applications, and communications.
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  1. Yurong Dai-MSFT 2,786 Reputation points Microsoft Vendor
    2024-05-09T08:53:59.7366667+00:00

    Hi @Rajini kanth ~,

    Regarding HTTP Error 500.19, you can refer to this Microsoft official document.

    HTTP Error 500.19 - internal server error when you open an IIS Webpage

    According to the HRESULT code you get, check the corresponding solution.

    If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

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    Best regards,

    Yurong Dai

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  2. Lex Li (Microsoft) 4,742 Reputation points Microsoft Employee
    2024-05-11T10:19:26.1633333+00:00

    This is more than well known. You have a compression method added but the bitness does not match.

    You have to review IIS configuration to find the culprit, and I have a blog post on that,

    https://docs.lextudio.com/blog/iis-7-and-wsus-on-windows-server-x64-1b59da5ac7ee

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