Fix session database configuration

config/session.php

@@ -20,7 +20,7 @@ return [
     'expire_on_close' => false,
     'encrypt'         => false,
     'files'           => storage_path('framework/sessions'),
-    'connection'      => null,
+    'connection'      => 'mysql',
     'table'           => 'sessions',
     'store'           => null,
     'lottery'         => [1, 100],

resources/stubs/installer/config.stub

@@ -107,7 +107,8 @@ return [
 
     // Overrides config/session.php
     'session' => [
-        'default' => 'database',
+        'driver' => 'database',
+        'connection' => 'mysql',
         'lifetime' => 60 * 24,  # 24 hours
     ],
 ];