Symptoms
- Websites are not available after upgrading Plesk. The following error is shown:
 HTTP Error 503. The service is unavailable
- Events with ID 2280 can be found at Windows > Start > Event Viewer > Windows Logs > Application:
The Module DLL C:Windowssystem32inetsrvrewrite.dll failed to load. The data is the error.
Could not load type '%SystemRoot%system32inetsrvrewrite.dll'.
Cause
does not exist on the filesystem or it’s corrupted.Â
%SytemRoot%system32inetsrvrewrite.dll
Resolution
-
Connect to the server via RDP;
-
Make sure that the
rewrite.dll
file exists in the folder%SystemRoot%System32inetsrv
:- If the
rewrite.dll
doesn’t exist, download the correct URL Rewrite Module version and install it at www.iis.net/urlrewrite - If it exists, rename or remove
%SystemRoot%System32inetsrvrewrite.dll
file and reinstall the package, which can be downloaded from www.iis.net/urlrewriteÂ
- If the
-
Open CMD as administrator;
-
Continue Plesk upgrade:
C:> plesk installer update