sign in zoom problem and can not attend the meeting

Dear All ,

I am facing a problem from last few days. Previously , It was working nice. 

After entering my mail id and password , It is showing that there is time out.  If some one given me link to join the meeting,  it is showing an unexpected error.  I am using ubuntu 18.04.  I then used another laptop and it is working fine . I think it is my laptop problem.

Can any one help me to figure out this. I have attached two screen shot with this threads.

regards,

Noor