Plesk is not accessible: 500.19 – Internal server error Module DynamicCompressionModule

Symptoms

Plesk is not accessible on localhost with the following error:

PLESK_INFO: HTTP Error 500.19 – Internal Server Error
The requested page cannot be accessed because the related configuration data for the page is invalid. Module DynamicCompressionModule
Notification SendResponse
Handler StaticFile
Error Code 0x8007007e
…

PLESK_INFO: HTTP Error 500.19 – Internal Server Error
The requested page cannot be accessed because the related configuration data for the page is invalid.
…
0x8007007e
…

Cause

Error Code 0x8007007e means ERROR_MOD_NOT_FOUND – The specified module could not be found.

This problem occurs because the %windir%system32inetsrvconfigApplicationHost.config file references a module that is invalid or that does not exist.

Resolution

Note: All commands have to be executed as administrator

1. Connect to the server via RDP.

2. Open Command Prompt under Administrator and run the following command to locate the module reference or the DLL reference that is invalid and ensure that the file exists and all required permissions are granted:

   C:> %windir%system32inetsrvappcmd.exe list config -section:system.webServer/httpCompression | findstr “dll”

   <scheme name=”gzip” dll=”%Windir%system32inetsrvgzip.dll” />
   <scheme name=”xpress” doStaticCompression=”false” doDynamicCompression=”true” dll=”C:Program FilesWSUSServicesWebServicessuscomp.dll” staticCompressionLevel=”10″ dynamicCompressionLevel=”0″ />

3. Remove or disable the XPress compression scheme from the configuration using the command below:

   C:> %windir%system32inetsrvappcmd.exe set config -section:system.webServer/httpCompression /-[name=’xpress’]

4. Create a IIS configuration backup:

   C:> %windir%system32inetsrvappcmd.exe add backup BeforeEditBackup

5. Stop IIS service in Plesk Services Monitor.

6. Edit file %windir%system32inetsrvconfigApplicationHost.config and remove the line like the following:

   xpress scheme <scheme name="xpress" doStaticCompression=... />

7. Start IIS service in Plesk Services Monitor.