Why Nepal banned to climbe alone on Everest?

Because an Australian climber found dead on Nepal largest peak Everest .Officials said that on Friday due to this incidence new rules are applied that no one will try to climb any hill in Nepal especially on Mount Everest .
The 41 year old climber is believed to die in late December after falling from a ridge , he leaved his guide back on the highest camp and decided to climb up the mountain alone. The guide Waite until 2:00 am the next morning and when he didn't return , the guide went village and alarmed. A search operation on foot and with helicopters took to find the climber 's body. A Spanish mountaineer Alex Txikon is currently on the Everest attempting the first winter summit of the world's highest peak in more than two decades.