V2.13.0 works only 3 days and then not working with CORS error

I deployed v2.13.0 on ubuntu16.0.4
It works for 3 days and cause CORS error and when I restart openvidu server by command “./openvidu restart”, it works again and then after 3 days not working.
I am waiting answer over 1 week, but no solution.
Nobody can help on this?