Problem s nextgen

ahojte,

na jednej skolskej stranke maju nextgen gallery a ked sa snazia pridat galerie do albumov a daju ulozit vzdy vyhodi nasledujuci error:

Proxy Error

The proxy server received an invalid response from an upstream server.
The proxy server could not handle the request POST /wp-admin/admin.php.

Reason: Error reading from remote server

wordpress 4.8 (ale robilo to aj v predchadzajucej verzii taktiez next gen je najnovsej verzie ale robili to aj aj predchadzajuce verzie) Hosting je vo websupporte

https://www.dropbox.com/s/g583eff7jophfuc/Screenshot%202017-06-23%2010.19.38.png?dl=0
https://www.dropbox.com/s/2lot1xx2alvhdfj/Screenshot%202017-06-23%2010.20.05.png?dl=0