You can ignore those warnings. Those won’t hurt you (in this case, sometimes warning are really problems).
The real problem is it still can’t find u8g.h
Then after that, it says it found two copies of the library, and used the first one. I’m guessing that you were trying to install it manually, and didn’t do it right, and that’s covering up the version that was installed from the .zip file.
Try renaming the folder: “C:\Users\chris\Documents\Arduino\libraries\U8glib” to “C:\Users\chris\Documents\Arduino\libraries\not_U8glib”.
And back out whatever you did to make it miss the Configuration.h