I wish you luck, just dealt with similar issue on an albeit older 04 fx35. sounded like it was working etc, but no dice. Manila override wouldn't work and I couldn't get the interior off when shut. so goddamn frustrating. was picking at it with a screwdriver through the hole, sprayed a bunch of wd40 and got in the trunk using the lever while having my girlfriend outside hitting the button on the trunk. IDK what did it but a combination of kicking from inside, and both of us trying the inside and outside switch (electronic and manual override) the door opened. I took the plastic off and it stayed off for a bit. got it to shut, but it wouldn't actuate in tightly, so it made a rattle as I drove and when it was in the out position the "door open" light would ding and come on and off.
It then wouldn't open again and I had to mess with it again with a screwdriver.
finally noticed a small electronic tab peice that was partially broken, likely just due to age.
my advice for when you finally get it open, buy the right replacement actuator from the get go. I tried to get one off amazon but it didn't fully work with the electronic system. I got the correct one off parts geek. it was more money but I wasted a good amount of time not doing it right the first time