Content Upload failed because of invalid response from the server

I am using Windchill PDMLink Release 12.0 and Datecode with CPS 12.0.0.0

Good morning
trying to check in objects from the windchill workspace gives the following error
"Content Upload failed because of invalid response from the server" thus blocking the server-side upload

Translated by the Community Moderation using Google Translate
-----------------------------------------------------------------------------------------------
Buongiorno
provando ad effettuare il check-in degli oggetti dal workspace windchill restituisce il seguente errore
"Content Upload failed because of invalid response from the server" bloccando così l'inserimento lato server

Here are the errors that I faced
Content Upload failed because of invalid response from the server