The clampdown followed a declaration last month by the People’s Coalition for Civil Action (PCCA) calling for a peaceful public uprising.
The new speaker was addressing a new session of parliament, which for the first time since the peace deal that ended the civil war is made up politicians from the governing party as well as…
Internet monitoring site NetBlocks confirmed the disruption.
But Puok Both Baluang, Machar's spokesman said the news was "not true", adding that the two parties had earlier discussed a 50:50 breakup.
South Sudan is reeling from escalating communal violence and a deepening humanitarian crisis, made worse by an ongoing political stalemate.
The Juba court on Monday also ordered Ali Thomas, known as Mama Amira Ali to pay 35 million South Sudanese pounds (about $87,000) to Kuol in compensation.
At least 32 people were reported dead in the clashes that broke out on Saturday.
Over the weekend, clashes within one faction in the national unity government may have left as many as several dozen people dead, according to officials.
The other side denied having suffered heavy losses and having launched an offensive.