…or you could fix the issue with the TMC library…
Jeff is right, the later library versions do not work with TT’s firmware, you need TMCStepper-0.5.2
Are you using Visual Studio to compile? In the platformio.ini file, in the [common] section you will find TMCStepper@>=0.5.0,<1.0.0 you need to change that to TMCStepper@=0.5.2
You will also find the same line further down in the [env:LPC1768] or [env:LPC1769] section (depending on your SKR board version)…change that too.
Then go to the Platformio tab on the side of the screen (alien head) and find ‘clean’ and click on that - that will remove the existing TMCStepper lib from your build directories, then click on ‘Build’ and it should download the 0.5.2 library, you can follow what it is doing in the terminal window…make sure it uses the earlier version of the library and it should compile ok.