Use Ctrl+\ to look at the UI layout. The items may have been rearranged. This can happen when the screen size is reset to it's default. Sometimes elements get stuck underneath others.
Use Ctrl+"O" (oh not zero) to check the user settings. There are a number of tabs to go through. On one of them there is an option to not show the radar. Also elements can be resized. If your radar got resized to 1 it will be hard to see.
fyi size 1 is very handy for the new alerts panel if you don't like the way it vibrates. Then you can move it to the bottom right corner of the screen where you can still click it easily.
Whoever says “I” creates the “you.” Such is the trap of every conscience. The “I” signifies both solitude and rejection of solitude. Words name things and then replace them. Whoever says tomorrow, denies it. Tomorrow exists only for him who does not seek it. And yesterday? Yesterday is Kolvillàg: a name to forget, a word already forgotten.
The Oath: A Novel by Elie Wiesel