Ethiopia, like many countries now, are actively censoring what people can see online. The folks at Tor have posted a workaround to allow for bypassing Ethiopian censors.
From Tor Project:
A few days ago, we published a blog post exposing the use of Deep Packet Inspection (DPI) to filter all Internet traffic in Ethiopia, including connections to the Tor network. We concluded that they are doing some sort of TLS fingerprinting, but had not been able to figure out exactly what they are fingerprinting on. Since then, we have managed to determine exactly how Ethiopia blocks Tor and we have developed a workaround.
For the fix itself, read on.
Source: Article Link
(Image used under CC from babasteve)