Want to switch Verizon Jetpack 8800L to GL-iNet E750. Auto-config isn't working

So I have an old beat-up 8800L hotspot provided by my employer and the thing is barely running. I’ve asked them few times to swap it out to a new unit or something modern but they pretty much ignore me.
I picked up GL-E750, cloned Jetpack’s IMEI (don’t want any trouble from employer in case they see different device on their account page) to it but it’s not working. Googling around it looks like people are trying to circumvent the rules by using unlimited plans and cloning phone IMEI but I’m just trying to use a modern hotspot.
What am I missing? Here’s the config page Imgur: The magic of the Internet