Handling connection error as an Odoo exception task#26184

Related issue: #27 (closed)

The translations for xunnel account also were updated due to the string message it appears

When trying to connect to the server and the response has not a JSON format the exception was raised and shown in the console.

Before

• Within the backend
• 
• In the console
• 

After

• Within the backend
• 
• No errors logs seen in the console.