The CAUSE was that their computers were sending data which was causing a problem. But they end up blaming the FAA, rather than taking the blame themselves.
This the problem with airlines in the USA (very general statement I know, but after years of flying there, I can make such a general statement with some accuracy).
For example,
in Atlanta, lightning striking the field
announcement "we have been grounded by ATC"
NO, you have been grounded by the weather, ATC is just the bearer of the bad news.
And in this case, the FAA did not cause them to not fly, their computers were the cause, the FAA was just the enforcer.
Imagine if the FAA had not stepped in?
Again, american arrogance.