Hmmmmm Computers making errors????
No they don't -
Humans entering data make errors,
Humans writing and programming the software make errors,
Computers do exactly what they have been programmed to do within their capabilities - it may not be what the commissioners wanted exactly, but that's down to humans interpreting the specifications for the programme, and humans understanding the capabilities of the computer they are working with.
Humans also design computers and they do not always understand the limiting factors of proper design, and how the components of a computer may interact or fail.
Humans make computers make errors.