Compiler error at start of mono develop and visual studio

Hello, i have a problem when im opening a script its get errors:
In Visual Studio:

Page '3185ed96-1cbd-4381-a439-636973542e50' not found.

and, as you see , there is nothing loaded in left side.
And in Mono develop:

Could not load project 'New Unity Project.csproj' with unknown item type '{E097FAD1-6243-4DAD-9C02-E9B9EFC3FFC1}'

Im using unity 5.6

@Glurth i dont know,i’ve not modified unity and it was installed right, with no problem, but anytime when i was opening a script its getting like above.

PS: sorry for my english