[Grbl_Esp32 Issue#66] Issue during compilation

Hello,
I am trying to upload the Web_UI, and I have an issue with the BTconfig.cpp during compilation. I tried with Arduino IDE versions 1.8.5, 1.8.6 and 1.8.7. Also with Partition Scheme by default, minimal and minimal SPIFFS (modified). Always with the same result.
I am probably making some mistake so help would be great. Thanks.

Here I copy the error message:

Arduino:1.8.7 (Windows 10), Tarjeta:”ESP32 Dev Module, Disabled, Minimal SPIFFS (Large APPS with OTA), QIO, 80MHz, 4MB (32Mb), 921600, None”

BTconfig.cpp:52:23: error: variable or field ‘mysppcb’ declared void

static void mysppcb(espsppcbeventt event, espsppcbparamt *param)

^

BTconfig.cpp:52:23: error: ‘espsppcbeventt’ was not declared in this scope

BTconfig.cpp:52:49: error: ‘espsppcbparamt’ was not declared in this scope

static void mysppcb(espsppcbeventt event, espsppcbparamt *param)

^

BTconfig.cpp:52:69: error: ‘param’ was not declared in this scope

static void mysppcb(espsppcbeventt event, espsppcbparamt *param)

variable or field ‘mysppcb’ declared void