So after the upgrade, only local deployment works, because the deployment of ESMC Agent via GPO or SCKM is a remote start of local deployment. ESET tool Remote Deployment does not work the same way as from web client ESMC.
In destination systems events start to appear with text"
ESET Remote Installer
Execution finished with 0x0, The operation completed successfully. Error code: 0x0
" , but no signs of presence of Agent there.
When are you planning to restore the ESET tool Remote Deployment and install the ESMC Agent via the web interface ESMC?