Issue using mutex on Arduino Uno R4 Wifi with Phillip Stevens FreeRTOS libary

When uploading the mutex example provided by Phillip Stevens FreeRTOS Library (Arduino_FreeRTOS_Library/examples/Mutex/Mutex.ino at master · feilipu/Arduino_FreeRTOS_Library · GitHub) to the Arduino UNO R4 Wifi, I get this error message:

In file included from C:\Users\Grimme\Documents\Arduino\libraries\FreeRTOS\src\Arduino_FreeRTOS.h:64:0,
                 from C:\Users\Grimme\Documents\Arduino\libraries\FreeRTOS\src\event_groups.c:38:
C:\Users\Grimme\Documents\Arduino\libraries\FreeRTOS\src\FreeRTOSConfig.h:32:10: fatal error: avr/io.h: No such file or directory
 #include <avr/io.h>
          ^~~~~~~~~~
compilation terminated.
exit status 1

Compilation error: exit status 1

I dont recieve this message when uploading it to the Arduino Uno.

How do I make it work on the Arduino Uno R4 Wifi?

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