You can check if API calls are made successfully by running the following in the CLI:
diagnose debug enable
diagnose debug application openstackd -1
In the FortiOS GUI, toggle the SDN connector to disable it, then enable it again. If the SDN connector was configured correctly and can populate IP addresses, the CLI resembles the following:
If something fails, the CLI shows the reason. The following example shows that the OpenStack identity's URL (IP address) may be incorrect.