• We value your experience with Plesk during 2025
    Plesk strives to perform even better in 2026. To help us improve further, please answer a few questions about your experience with Plesk Obsidian 2025.
    Please take this short survey:

    https://survey.webpros.com/

Service unavailable/sitepreview.dll missing

T

TorstenK

Guest
After updating from 10.0 to 10.2 the plesk panel showed "Service unavailable".
I found a solution by deleting the undefined sitepreview filter in ISAPI (IIS Website Properties). Now the event viewer tells that the HTTP-Filter-DLL ..PLesk\isapi\sitepreview.dll could not loaded. The dll is not in this directory!
Can someone tell me where to get this dll in order to put it to the ISAPI correctly?

Thanks ;-)
 
Starting from Plesk 10.2 sitepreview ISAPI filter is not required anymore.

The following command executed during upgrade to remove filter from IIS:
"%plesk_dir%\admin\bin\websrvmng.exe" --remove-global-filter --name=sitepreview

Since global filters are cached in IIS, maybe you will also need to execute:
iisreset /RESTART /TIMEOUT:120

after that.

p.s. do you have any errors in Plesk event log during update? Or maybe you can zip and send to me privately your autoinstaller3.log located at c:\<RANDOM_LONG_STRING>\ ?
 
Back
Top