Always validate the network configuration. The VSAN Misconfiguration detected error is by far the most common error seen when configuring VSAN. Normally this means that either the port group has not been successfully configured for Virtual SAN or multicast has not been set up properly.
On Cisco switches, unless an IGMP Snooping Carrier has been configured OR IGMP snooping has been explicitly disabled on the ports used for Virtual SAN, configuration will generally fail. In the default configuration it is simply not configured, and therefore, even if the network admin says it is configured properly it may not be configured at all, double check it to avoid any pain.