Try these solutions depending on your situation.
Check that the computer is connected to the network.
To monitor projectors even when they are in standby mode (when the power is off), see the following for the necessary settings for your model.
https://download2.ebz.epson.net/sec_pubs_visual/apps/epmc/settings/EN/set_standby_mode.html
The configuration file may be corrupted. Try copying again.
When monitoring the projector without the Epson Projector Connected Agent software, you cannot download a configuration file containing the menu settings from the projector using Epson Projector Management Connected.
You cannot import menu settings to any projector using Epson Projector Management Connected. See your projector's User's Guide for instructions on importing them.