Authentication token expired

Hi. I have updated the server, and after some time of inactivity of the client application started getting the error:
Operation failed: OperationResponse 230: ReturnCode: 32753 (Authentication token expired). Parameters: {} Server: MasterServer
Authentication failed: 'Authentication token expired' Code: 32753

I use a local server - Photon-OnPremise-Server-SDK_v4-0-29-11263.exe