When I install IPB v2.3.3 all instaling process is normal, but after that, when i try to look forum appears

Fatal error: Class 'skin_global_2' not found in /home/www/kwx_forum/sources/ipsclass.php on line 2021

How can i fix this eror??
P.S. No skins are changed...

No support here as per the the rules.

You will need to raise a ticket or post in the Peer to Peer forums.

Hello,

If you require assistance please submit a ticket via your client area. or an email to support[@]invisionpower.com.