Timetracker for VSTS client keeps disconnecting

as for the title since the upgrade to 4.x version the Timetracker for VSTS desktop application keeps disconnecting making it almost impossible to switch from an activity to another. 

The client also signal error about the impossibility to send data to you server, the problem is common to all my teammates, this is out first report about the issue 'cause we thought you were having issue with the deploy, but the situation is steady and the Timetracker application almost unusable