@jeffp
Looks that
@coolbreeze is right.
Most likely, at some point the mid-section got glued to the pan, cooled down, and when you tried to open it, the red and green tubes bent and moved a little inward.
Maybe it’ll destroy it completely, but maybe it can help:
Unscrew just a little bit “red” and “green” and try to put the mid-section into the place - don’t push too much, you don’t need to lock it, just to push “red” and “green” little bit deeper.
Put the vapman on the desk, then you perform it - so it will be easy to find 90’ angle between mid-section and core.
Don’t lock it completely - tubes may move too deep - you just need the tubes little bit deeper and to compensate for the curves.
Also be gentle on screws - the heads are already damaged.