When adding new ISG-Proxy (Edge SWG) to the Management Center following error occurs:
"An unexpected server error occurred"
Incorrect type of device - "Integrated Secure Gateway" - is being added.
When adding Edge SWG(ProxySG) device regardless of type(Virtual or Physical) or hypervisor(SSP/ISG, VMware, KVM, Hyper-V or Cloud platforms) following device type should be selected:
More details: Add a Device to MC
"Integrated Secure Gateway" should be used when adding Broadcom ISG(SSP) Hypervisor: