Assemblers are easily one of the most temperamental things in the game. Typically, problems arise because they are full, but in this case it's entirely possible something else is going on. If you have any interest, PM me and I can get you into a Discord group I'm part of that's full of folks who can help you troubleshoot! We're very patient, and we like to help folks out. Like, you can hop into a voice chat with us, share your screen, and we'll get you straightened out really quickly.
That invitation to open to anyone, too, even if you just want a place to chat about SE. It's a private community, but it's full of great people.
I was excited to try this, but I typically play multiplayer, and weaponscore is blocking it haha. I guess there may be an issue with it.