Cannot compile for pro micro(leonardo).

Development Tools IDE 1.x
1

I'm trying to compile a sketch for my pro micro(leonardo) and get this error:
Arduino: 1.8.13 (Windows 10), Kortti:"Arduino Leonardo"

C:\Users\hed\AppData\Local\Temp\ccF7jooZ.ltrans0.ltrans.o: In function `write':

C:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino/Print.h:54: undefined reference to `Keyboard_::write(unsigned char const*, unsigned int)'

C:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino/Print.h:54: undefined reference to `Keyboard_::write(unsigned char const*, unsigned int)'

C:\Users\hed\AppData\Local\Temp\ccF7jooZ.ltrans0.ltrans.o:(.rodata+0x24): undefined reference to `Keyboard_::write(unsigned char const*, unsigned int)'

collect2.exe: error: ld returned 1 exit status

exit status 1

Error compiling for board Arduino Leonardo.

The only thing i have changed is the keyboard library so i can have it use the Finnish layout.