Compilation error using "setBackgroundFillMethod"

[Beredro]

Hello Guys,
I like this Library and got it to render Font pretty well so far.
Now I am trying to use the setBackgroundFillMethod() function to set the background fill method of an OpenFontRender instance, but I am encountering compilation errors.

Here's the code snippet I tried:
render.setBackgroundFillMethod(BgFillMethod::Block);

And I also attempted:
render.setBackgroundFillMethod(OpenFontRender::BgFillMethod::Block);

For the first example using "BgFillMethod::Block," the error message is:

c:/users/XXXXX/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32s3-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32s3-elf/8.4.0/../../../../xtensa-esp32s3-elf/bin/ld.exe: C:\Users\XXXXX\AppData\Local\Temp\arduino\sketches\85F2AE1913F559FC9EDFB4035A9B5E91\sketch\objs.a(GFX_LilygoTest.ino.cpp.o):(.literal._Z4loopv+0x48): undefined reference to OpenFontRender::setBackgroundFillMethod(BgFillMethod)'

For the second example using "OpenFontRender::BgFillMethod::Block," the error message is:

C:\Users\XXXXX\Documents\Arduino\GFX_LilygoTest\GFX_LilygoTest.ino: In function 'void loop()':
C:\Users\XXXXX\Documents\Arduino\GFX_LilygoTest\GFX_LilygoTest.ino:324:54: error: 'OpenFontRender::BgFillMethod' has not been declared
       render.setBackgroundFillMethod(OpenFontRender::BgFillMethod::Block);

I am unsure how to proceed and set the background fill method correctly. Can you please help me understand what might be causing the issue and how to resolve it?

Thank you!

[Beredro]

Arduino IDE had an old version in memory... it got confused and even restarting couldn't help.
I edited the .h and .cpp and saved it...that solved it.