LCS error An error has occurred. Please try again later. If the issue persists, please contact support with this Id: 859f43e3

I recently opened LCS and got following error when I clicked one of my D365FO environments:
"An error has occurred. Please try again later. If the issue persists, please contact support with this Id: 859f43e3-9f0b-44e3-b415-803d3dff998d"

There's nothing to worry about. This issue is from Microsoft side, just try again after some time (like half an hour or an hour); the error will be gone by itself. In case there's some urgent deployment going on do raise a ticket with Microsoft.