The data processor tech needs electromagnetic science packs but doesn't require the tech for those. That is kinda weird, but probably just an oversight.
Basically just this
table.insert(data.raw["technology"]["moshine-tech-data-processor-building"].prerequisites, "electromagnetic-science-pack")
but of course you can edit your tech directly instead of insertion.
The other solution of course would be to remove the electromagnetic science pack cost from this tech, it's an outlier anyway, because it's the only tech from the mod that needs that pack...
...except for maglev trains, which - now that I just checked - are actually also missing the same tech prerequisite.
(it's tech-space-trains for those)