@arexler22 Firstly please double check developer mode is on if not put it on and try again.( very bottom of About section). You can manually put the device into fastboot by restarting it holding the power button and volume down buttons at the same time(fastboot appears in small text bottom left of screen).
You could also try the Magic Device Tool (dev version) if it still supports ubports.This worked for me when putting ubports on my mx4 a few weeks ago. If not it may still be able to unlock your bootloader (OEM unlock).
Also have a look at the last two posts by Marathon2422 under the thread Install UBports in an Aquarius 10 etc in the support section. That script might help but change the word frieze to arale and devel to stable. You will also need to install ADB and fastboot on your PC / laptop first. There are plenty of instructions out there. Search this forum or the net. When thats done run
sudo bootloader OEM unlock
and carry on from there.
Sorry if this is very confusing but you will get there in the end.