There are a few things to check. 

Ensure the Renderer is authorized and the status indicator is green.  

Ensure the Monitor has been connected to the proper host name or IP address.   

Ensure the beds and objects are using the same busses as the Dolby Atmos Renderer  Send plug-in.

Ensure you have assigned Dolby Renderer Send and Return plug-ins in your Pro Tools session;  

if there are no Send or Return plug-ins, no audio or metadata will be routed.

Ensure that either headphone or speaker monitoring is enabled in the monitoring page of the Renderer Application.