Plugin and function don't work after upgrading

[Amy Pond]

Hello everyone!

I have upgraded IPS to 4.0.12.1 version from 4.0.11

The plugins have stop working post upgrading; in dashboard i have this message:

Attività blocate

The following tasks appear to be locking frequently: updatecheck.
Please run them manually. If you require assistance with any errors shown please contact technical support.

And when i tried check manually the upgrade for Applications the board show this message:

Si è verificato un errore di configurazione o del server

EX0 Qualcosa è andato storto. Per favore, riprova.

What must I do?