'Millisecond' software error caused air traffic outage that grounded thousands of flights

According to a report by Sky News… The air traffic outage that grounded thousands of flights was not caused by a ‘military operation’ but by a software problem, an initial investigation has found. complete report is on link below. Source: https://news.sky.com/story/millisecond-software-error-caused-air-traffic-outage-that-grounded-thousands-of-flights-13589298