Version 4.7.6

system/Session/Store/Redis.php

@@ -149,6 +149,13 @@ class _Redis extends \IPS\Session\Store
 
 		foreach( $sessionMap as $session )
 		{
+			/* SessionMap may not link to a valid session, remove if that is the case */
+			if( !\is_array( $session ) )
+			{
+				\IPS\Redis::i()->zRem( static::_key( 'session_map' ), $session );
+				continue;
+			}
+
 			$delete = false;
 			if ( $session['member_id'] == $memberId )
 			{