Plesk Update problem

I have a update Probleme in Linux

Can't process versions.inf3: Herunterladen des Pakets http://autoinstall.plesk.com/versions.inf3 fehlgeschlagen:
couldn't connect to host

in the firewall i have
ModSecurity
after switch off the firewall is the same.



in the Plesk panel.log i see a lot of this message:

[2016-02-15 15:56:17] ERR [panel] [56c1e7117b3cf] Result of interface implementation call: failure: Method arguments cannot be decoded



i see this process:

ps auxffww...

Plesk Update problem