There were hundreds of these cases, and the affect post-masters were calling the IT helpline repeatedly saying sums of money were going missing. Personally I think that if you have hundreds of people of good reputation and standing swearing up and down that they didn't steal money, and there's a record of their having called repeatedly to report erroneous data in the software, then there should be some sort of investigation to figure out what was going on. Instead they were shouted down and threatened.
There was a case where after a call to the IT helpline the "missing" money just doubled, and the helpline just said "well pay the new amount or go to jail"
The point is that the bugs on their own would have been merely a nuisance leading to unnecessary audits if not for the severe mismanagement around them.
Seems like an uncharitable interpretation. Reads more like they were replying to the headline by saying management sent people to prison, not the glitch.
It was corrupt managers, police and goverment! Literal conspiracy to destroy lives of innocent people!