I have been playing around with the circuit simulator in eeschema, but am struggling to figure out how to fix the subcircuit with the voltage reference on U1.
It looks like there is something on the imported pspice models that ngspice does not interpret correcly. I did set the alternative pin mapping manually, although I am not sure I got it right.
This seems like a similar error to what was proposed as fix in KiCAD netlist wrong wrt ngspice AD8001 by @holger, but I am not sure if I need to modify the model or I am just misunderstanding how to use the models.
Too few parameters for subcircuit type "lm385-adj_trans" (instance: xxu1) Error: there aren't any circuits loaded.
I only noticed the error about no circuits loaded, on a second review of the problem, but I guess that is caused by the too few parameters issue.
The design can be fetched from https://github.com/nickoe/msoon_ovp/tree/00a25dee6619a23247b125d153a81bbf2cbbca3b
I am using 5.1.7-1-gca8f026bc with ngspice-git r6966.0ca66abd3-1