I read in the MW 1.27.0 release notes that a lot of new stuff was added for session handling, but I don't understand what I need to change in my PHP to use the new session handler ?? Could you detail ??

Could that be why I am getting the session handling errors below after my fresh install of MW 1.27.0 on Windows ? Does anyone have MW 1.27.0 working on Windows ?

* Massive overhaul to session handling: * $wgSessionsInObjectCachehttps://www.mediawiki.org/wiki/Manual:$wgSessionsInObjectCache is no longer supported and must be true, due to MediaWiki\Session\SessionManager. $wgSessionHandlerhttps://www.mediawiki.org/wiki/Manual:$wgSessionHandler is similarly no longer used. * ObjectCacheSessionHandler is removed, replaced with MediaWiki\Session\PhpSessionHandler. * PHP session handling in general ($_SESSION, session_id(), and so on) is deprecated. Use MediaWiki\Session\SessionManager instead. A new config variable, $wgPHPSessionHandlinghttps://www.mediawiki.org/w/index.php?title=Manual:$wgPHPSessionHandling&action=edit&redlink=1, is available to cause use of $_SESSION to issue a deprecation warning or to cause most PHP session handling to throw exceptions. * Deprecated UserSetCookies hook. Session-handling extensions should generally be creating a custom subclass of CookieSessionProvider. Other extensions messing with cookies can no longer count on user data being saved in cookies versus other methods. * Deprecated UserLoadFromSession hook, extensions should create a MediaWiki\Session\SessionProvider. * The User cannot be loaded from session until after Setup.php completes. Attempts to do so will be ignored and the User will remain unloaded. * CSRF tokens may be fetched from the MediaWiki\Session\Session, which uses the MediaWiki\Session\Token class.

Here's my stack trace of failure. I don't understand what to do with it, but if you do, please write back.

Exception encountered, of type "InvalidArgumentException" [26551a8b219289e75be6de8a] /test1270/index.php?title=Main_Page InvalidArgumentException from line 194 of I:\wwwroot-basp\test1270\includes\session\SessionManager.php: Invalid session ID Backtrace: #0 I:\wwwroot-basp\test1270\includes\session\SessionManager.php(126): MediaWiki\Session\SessionManager->getSessionById(string, boolean, WebRequest) #1 I:\wwwroot-basp\test1270\includes\Setup.php(745): MediaWiki\Session\SessionManager::getGlobalSession() #2 I:\wwwroot-basp\test1270\includes\WebStart.php(137): require_once(string) #3 I:\wwwroot-basp\test1270\index.php(40): require(string) #4 {main

thx, L