Error unable to upgrade to v1.9.7.7.

  • Using WordPress 4.2.3 Multisite

    Trying to upgrade the responsive theme version 1.9.7.6 to latest version 1.9.7.7.

    Fatal error: Call to a member function display() on a non-object in C:\wamp\www\wp-admin\includes\class-wp-upgrader-skins.php on line 372

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