After applying some patches on OSCE 10.6 SP3 Patch 1.1 running on Windows 2008 R2 64-bit server, the following error appears:
Server error 502 - Web server received an invalid reponse while acting as a gateway or proxy server.
The error above shows in Server Update logs, System Event logs, and User accounts.
The issue occurs because the MSXML 4.0 is uninstalled and replaced by MSXML 6.0. Unfortunately, OfficeScan does not support MSXML 6.0 yet. A feature request has been submitted to support this version and to include include MSXML in the system requirements.
As a workaround, reinstall the MSXML 4.0 Service Pack 3.
If the issue persists, collect the following files:
- Process Monitor log
Make sure to choose All Events when you save the log.
- DLL files under the C:\Windows\SysWOW64 folder: