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horizon error

Hi All,

I have installed openstack on two nodes. Compute and controller node. Networking also is installed on the controller node. I am able to create an instance from backend using nova boot command from command line. But if I try to launch the instance from dashboard, a line starts revolving at the centre of the screen and it goes on for a long time. In the end two error messages are displayed on the screen. One is "unable to launch the instance" and the other is "the server has either erred or is incapable ...................................." .

In the nova-api logs, rpc timeouts for network are observed ? What is causing the error in the dashbaord ?