NSX cannot be enabled on the cluster because it contains host ffaee91d-e394-4dfa-af2d-6bfefc4c3d16:host-1001 of unsupported version. (Error code: 26221)

 

NSX cannot be enabled on the cluster because it contains host ffaee91d-e394-4dfa-af2d-6bfefc4c3d16:host-1001 of unsupported version. (Error code: 26221)

Apply a Transport Node Profile to the selected cluster. NSX will be installed with the deployment configuration defined in Transport Node Profile.

 

If you are getting above error means your NSX-T  Version is not supported with current ESXI version.

Open VMWare Product Interoperability link to validate the products and download the correct Version.

https://interopmatrix.vmware.com/Interoperability?col=2,&row=912,