The internet appliance, outdated since v2.0, is still in this registry and therefore installable. Using the internet appliance shows the error message Parameter 'type' expects a netdev backend type, see https://gns3.com/community/featured/internet-appliance-error-paramet.
The reason for this message is, that the Ubuntu qemu doesn't support the netdev backend 'vde'. Only for Ubuntu Trusty/14.04 the “Qemu backport” https://launchpad.net/~gns3/+archive/ubuntu/qemu contains a qemu, that supports vde. Besides that the newer GNS3-VMs don't install the vde2 package.
Therefore I suggest to delete the internet.gns3a appliance.
The internet appliance, outdated since v2.0, is still in this registry and therefore installable. Using the internet appliance shows the error message
Parameter 'type' expects a netdev backend type, see https://gns3.com/community/featured/internet-appliance-error-paramet.The reason for this message is, that the Ubuntu qemu doesn't support the netdev backend 'vde'. Only for Ubuntu Trusty/14.04 the “Qemu backport” https://launchpad.net/~gns3/+archive/ubuntu/qemu contains a qemu, that supports vde. Besides that the newer GNS3-VMs don't install the vde2 package.
Therefore I suggest to delete the internet.gns3a appliance.