I can't login OpenNebula interface?

Yesterday it’s was working properly but not i don’t know what happen. Now i can’t login with same credentials. It show this :
“OpenNebula is not running or there was a server exception. Please check the server logs.”
And i have restarted all the service and they all are running and i also check the log it say this:
Wed Apr 04 04:53:58 2018 [E]: User oneadmin could not be authenticated
Wed Apr 04 04:53:58 2018 [E]: Connection refused - connect(2)
Wed Apr 04 04:53:58 2018 [E]: undefined method `Exception’ for #CloudAuth:0x00000001f973a0
Wed Apr 04 04:53:58 2018 [I]: 1XX.XXX.XXX.XXX - - [04/Apr/2018:04:53:58 +0000] “POST /login HTTP/1.1” 500 - 0.0350

All the credentials are the same.

I am also facing the same issue any solution for that