Seeeduino xiao expansion board oled u8x8lib.h no such file or directory

I’m trying to follow the tutorial for the Seeeduino Expansion Board OLED “Hello World” frome here:

I have installed the board through the board manager and the Arduini IDE recognizes the board and port. I followed the instructions to add the zip library for the u8g2 library. It says the library has been added, however, when I compile the code, it has an error stating:

Arduino: 1.8.13 (Windows 10), Board: “Seeeduino XIAO, Arduino, Off”

seeeduinoXiaoOled:2:10: fatal error: U8x8lib.h: No such file or directory

#include <U8x8lib.h>

      ^~~~~~~~~~~

compilation terminated.

exit status 1

U8x8lib.h: No such file or directory

This report would have more information with
“Show verbose output during compilation”
option enabled in File → Preferences.
My google and forum searches yielded no results that helped. Any advice would be appreciated. Thanks!

I have been trying to run the OLED example from the Wiki with no success so far. My first attempt was to download the ZIP file from the u8g2 link. I then attempted to use the Arduino library manager to install from the zip file and that failed with an error that the zip file did not contain a valid library.

I then followed the instructions for the u8g2 library and used the library manager to search for u8g2. A library was found and installed. The sketch copied from the Wiki compiled and downloaded but the OLED remains blank.

The end of the download and verify operation all looks reasonable:

Verify successful
done in 0.052 seconds
CPU reset.
readWord(addr=0)=0x20002dd8
readWord(addr=0xe000ed00)=0x410cc601
readWord(addr=0x41002018)=0x10010305
writeWord(addr=0xe000ed0c,value=0x5fa0004)

So I may give up and put the XIAO on the shelf until I decide to stumble around some more.