Functions with names that start like vApplication… are function that you need to supply, based on settings in your FreeRTOSConfig.h.
vApplicationStackOverflowHook is needed because you have enabled stack overflow checking,
vApplicationGetIdleTaskMemory and vApplicationGetTimerTaskMemory are needed as you have enabled static creation of tasks.
vApplcationMallocFailed Hook is needed because you have enabled the callback for lack of memory.
You need to either provide those functions as documented or turn off those options.
You should read the documentation provided on configuing FreeRTOS at FreeRTOS Configuration