Thread:Project:Support desk/404 errors after upgrade from 1.15 to 1.20/reply (12)

You are using IIS as server, not Apache (which I expected).

The line, which you posted, is such an error message, which we need.


 * ''MODULE_SET_RESPONSE_ERROR_STATUS, FastCGIModule, Notification:128,HttpStatus 500 ...

Is that all? Or does the line continue after that? Is there still a rest, which you did not copy? A more specific ErrorCode than just "HttpStatus 500" would help.

The new extensions in 1.20 are not needed to run MediaWiki. So if you do not include them in LocalSettings.php, this should not break anything.

But if you are using other extensions, disable all of them temporarily. Then test, if the problem is gone then. If it is, enable them one by one and see, which one causes the issue.