Refer to the M1XEP Instruction page 18 to set the M1XEP back to DHCP Mode, (Jp2 Jumper, one blink per second, remove the Jp2 jumper and let the M1XEP reboot) and the after the M1XEP reboots it should get a new IP Address from the router. In ElkRP2 under Setup, Options, Network Adapters make sure to select the IP of your PC on the Local Area Network. Next try to FIND the M1XEP and make your connections.
I have the same issue and was wondering how this was resolved? I tried several times with the jumper (2 blinks / 4 blinks) to no avail. Reverted all connections back to original setup and I still don’t see it on my network. I just purchased this M1XEP in early February 2024.