Undefined reference to the main error

[Omer-sync]

Compile [ 97.2%]: arm_cfft_radix4_init_f32.c
Compile [ 97.5%]: arm_cfft_radix8_f32.c
Compile [ 97.8%]: arm_dct4_f32.c
Compile [ 98.1%]: arm_dct4_init_f32.c
Compile [ 98.4%]: arm_rfft_fast_f32.c
Compile [ 98.8%]: arm_rfft_f32.c
Compile [ 99.1%]: arm_rfft_fast_init_f32.c
Compile [ 99.4%]: arm_rfft_init_f32.c
Compile [ 99.7%]: test_helpers.cc
Compile [100.0%]: schema_utils.cc
Link: mbed
c:/program files (x86)/gnu arm embedded toolchain/9 2020-q2-update/bin/../lib/gcc/arm-none-eabi/9.3.1/../../../../arm-none-eabi/bin/ld.exe: BUILD/NUCLEO_F411RE/GCC_ARM/mbed-os/platform/source/mbed_sdk_boot.o: in
function __wrap_main': C:\Users\b720\Desktop\Repo\KWS_MCU\tensorflow\tensorflow\lite\micro\tools\make\gen\linux_x86_64\prj\kws_cortex_m\mbed/.\mbed-os\platform\source/mbed_sdk_boot.c:177: undefined reference to main'
collect2.exe: error: ld returned 1 exit status
[ERROR] c:/program files (x86)/gnu arm embedded toolchain/9 2020-q2-update/bin/../lib/gcc/arm-none-eabi/9.3.1/../../../../arm-none-eabi/bin/ld.exe: BUILD/NUCLEO_F411RE/GCC_ARM/mbed-os/platform/source/mbed_sdk_boot.o: in function __wrap_main': C:\Users\b720\Desktop\Repo\KWS_MCU\tensorflow\tensorflow\lite\micro\tools\make\gen\linux_x86_64\prj\kws_cortex_m\mbed/.\mbed-os\platform\source/mbed_sdk_boot.c:177: undefined reference to main'
collect2.exe: error: ld returned 1 exit status

[mbed] ERROR: "C:\ProgramData\Anaconda3\envs\kws_mcu\python.exe" returned error.
Code: 1
Path: "C:\Users\b720\Desktop\Repo\KWS_MCU\tensorflow\tensorflow\lite\micro\tools\make\gen\linux_x86_64\prj\kws_cortex_m\mbed"
Command: "C:\ProgramData\Anaconda3\envs\kws_mcu\python.exe -u C:\Users\b720\Desktop\Repo\KWS_MCU\tensorflow\tensorflow\lite\micro\tools\make\gen\linux_x86_64\prj\kws_cortex_m\mbed\mbed-os\tools\make.py -t
GCC_ARM -m NUCLEO_F411RE --source . --build .\BUILD\NUCLEO_F411RE\GCC_ARM"
Tip: You could retry the last command with "-v" flag for verbose output

Is there anyono who see this error? and help me to solve this.