Hello,
I had the same issue, CF-E110 with 8MB flash.
I retreived the flash memory map from the EOM firmware log (see previous screenshot) and modified accordingly the dts file of the OpenWRT 19.0.rc2 distribution code, Then I compiled the new firmware and it works fine now.
In case you have tried the 16M firmware maybe you are stuck in the boot process. Using the TFTP recovery method works well and allows you to either reload the EOM firmware (I did it several time) or the new image.