On September 16, 2018, the Regional Directorate of Foreign Trade and Tourism in Cusco, Peru, issued a public announcement asking all tour operators to refrain from organizing trips to the Rainbow Mountain. The reason is that two communities bordering the Winincunca Mountain are having conflicts that may affect the safety of tourists. We will keep you updated as more details are made available. 

Here is a copy of the announcement translated to English: 

COMMUNIQUÉ TO PUBLIC OPINION AND TOURISM OPERATORS
Public Opinion is made known. That, Given the facts raised among the residents of two communities bordering the mountain of Winincunca, the Regional Directorate of Foreign Trade and Tourism - DIRCETUR deeply regrets that there have been clashes between our brothers, which generates a negative image for our visitors who want to know this natural wonder.
That the conditions of insecurity subsist at the time of issuing this statement, for which we invoke the tour operators refrain from organizing trips to the area, until order and social tranquility in the area of tourist operations is restored, in order to protect and provide security to our visitors and operators.
Finally state that the Regional Directorate of Foreign Trade and Tourism, in coordination with MINCETUR and local authorities, we have been working with the aim of achieving a consensual plan of territorial management and tourism operation that should give sustainability to such an important destination.