Kindly have check on the asset agent explore , these agents are installed on all system and are meant to scan on system boot/reboot but due to some reason they are failing to scan the system.

However if we change the setting from change scan credentials under Actions and select Domain mode and scan the same system it dose scan it without any error

As per the error message Manage Engine server is unable to communicate to the asset explorer agent on the system.

Kindly check and assist.