[Grbl_Esp32 Issue#551] Problems Compiling Firmware

Please answer the following questions:

Have you read the wiki regarding how to compile?
YES
What version of the Arduino IDE are you using?
1.8.13
What version (commit date) of the Arduino core for the ESP32 are you using?
1.0.4 (Oct 2, 2019)
Are you using the master branch of Grbl_ESP32?
YES
Have you made any edits or configuration changes (list them) to the firmware?
NO
Please paste the compiler error text here:
“
In file included from sketch/grbl.h:61:0,
from /home/randolph/snap/arduino/current/Arduino/libraries/GrblEsp32/GrblEsp32.ino:21:
sketch/Motors/MotorClass.h:34:68: fatal error: TMCStepper.h: No such file or directory
compilation terminated.
exit status 1
Error compiling for board ESP32 Dev Module.
“