Error: Failed to create VNF: Request Failed: internal server error while processing your request.

Hi,

I got the error when creating vnf using both horizon and CLI with "Request Failed: internal server error while processing your request."

$ tacker vnfd-list
+--------------------------------------+-------------------+-----------------+-----------------------+
| id | name | template_source | description |
+--------------------------------------+-------------------+-----------------+-----------------------+
| b58e02ab-2d9f-457f-af5c-495e3f051923 | vnfd-nova-flavor | onboarded | Demo example |
| ff9bf2e4-2503-4eec-bd68-91395a4be35f | vnfd-cpu-dedicate | onboarded | Dedicated CPU example |
+--------------------------------------+-------------------+-----------------+-----------------------+

$ tacker vnf-create --vnfd-id ff9bf2e4-2503-4eec-bd68-91395a4be35f vnf-cpu-dedicate
Request Failed: internal server error while processing your request.

I am using tacker version 0.10.0, openstack 3.12.0, ubuntu 17.04, devstack/master. Can any one help me to solve this problem?

Thanks.