If you are facing Epson printer offline situation but it is powered on then there might be an issue with the connection.

If your printer is connected with an Ethernet cable then make sure that the cable is linked to the router and the printer in a proper manner. If you require an IP address then you can take a print of the network configuration page for reference.

If you are using a USB cable then you should check if it is unfastened in any way or not. If you think that there is a problem with the USB cable then you can also connect it directly instead of a hub.

If you have a wireless connection then you should use the network configuration page to obtain the IP address and ensure that the printer and the system are both connected to the same wifi connection.