Can't apply QoS output service policy to Cisco 9300

[admin1234]

While trying to apply a QoS outbound rule to a Catalyst 9300:

Invalid queuing class-map!!! Queuing actions supported only with dscp/cos/qos-group/precedence/exp based classification!!!

The config we are using is below: 

policy-map Shoretel-Input-Policy
class class-shoretel-media-input
  set dscp ef
class class-shoretel-signaling-input
  set dscp cs3
class class-default
  set dscp default
policy-map Shoretel-Output-Policy
class class-shoretel-media-output
  set dscp ef
  priority level 1 percent 5
class class-shoretel-signaling-output
  set dscp cs3
  bandwidth remaining percent 15 
 class class-default
  set dscp default
  bandwidth remaining percent 60

[balaji.bandi]

Look at some FAQ here :

https://www.cisco.com/c/en/us/support/docs/switches/catalyst-3850-series-switches/200729-Common-QoS-error-messages-on-Catalyst-38.pdf