Hi Andrey,

Assist is a separately licensed product. Being On-premises you will need to check you are licensed follow these instructions - https://kb.vmware.com/s/article/2961361?lang=en_US

Also checkout this docs page on high level architecture and requirements to ensure you have everything in place - https://docs.vmware.com/en/VMware-Workspace-ONE-UEM/services/WS1_Assist/GUID-AWT-RMV4-INTRO.html

and then follow this doc to actually implement - https://docs.vmware.com/en/VMware-Workspace-ONE-UEM/services/WS1_Assist/GUID-AWT-INSTALL-ARM-SUPERTA...

I know you said you have already deployed, just walk through the docs and ensure you have done everything it says please. Otherwise, I would log a support call via Customer Connect - https://customerconnect.vmware.com/