New window regulator seized. Ideas?

[4thgencreamsicle]

Ok. So I just rebuilt everything in my doors (69 c10) and when I rolled my manual window all the way up for the first time it seized in place.

I thought maybe the new felts were bunched/torn or maybe one of those plastic rollers busted. No dice, I carefully pulled everything back out and it was all good visually. Pulled the regulator and sure enough it’s seized at the mechanism behind the crank handle.

Am I missing something obvious like a hidden release latch? Please say I am. 😬 I really just want to get these doors back together before it starts raining again.

Btw it’s brand new from Lmc. Bought them over a year ago and only now am I at a place where I can work on them.

Until I hear back from you amazing people, I’ll be busy seeing if I can get the drivers side buttoned up. Here’s crossing my fingers that this one will work.