Attachment 3617

My Kali Linux 2019.1 virtual machine desktop becomes Sky blue color during update in progress. I have been using Kali VM using VirtualBox in past some days. I restarted VM and my laptop, still issue continues, If i try to open any applications or terminal, it automatically logged out and ask me to login again. I attached the screenshot here for reference. Anyone help me with this issue..so that i continue to increase my knowledge over Kali Linux..Thanks in advance.