Calculations go to ? (Question Mark)

I’ve been modelling my save file factories. I created outposts for the various production chains of end products. Mostly only extractors are on the top-most level.

When connecting an outpost output to an output input, the entire file’s calculated numbers go to “?”.

To recreate, open the export file, and there are two outposts near the bottom left, titled “Enclosed Beam and Automated Wiring” and “SAM Processing”

When connecting the Steel Pipes is when everything goes to “?”