Ah, I see … your install instructions are here https://doc.e.foundation/devices/dreamlte/install; you correctly quote the passage:
- Push and install the /e/ .zip package:
adb push </e/ zip package> /sdcard/
adb shell twrp install /sdcard/</e/ zip package>
adb shell rm /sdcard/</e/ zip package>
It is a convention that the content within < angle brackets > has to be filled in by the user, but excluding the angle brackets themselves. That literal content will produce exactly the result you got. My apologies that I did not spot and mention this in my first reply. 
Thanks for testing the Factory reset option – always worth a try.
I would expect that you could proceed as
The method where you simply copy the /e/ image to SD card with familiar tools may be the most reliable.
The “missing” wipe cache might have caused the issue.
I am not sure if you are using Windows (it does not matter at this point) but this tutorial may help demonstrate your options with TWRP, if this is unfamiliar to you.
Pick up the following tutorial at
8) Install /e/ with TWRP
[HOWTO] Install /e/ on a Samsung smartphone with Windows easily