The tutorial custom BLE errors

[Nats]

Im trying to use the code given in the tutorial "https://github.com/NordicPlayground/nRF52-Bluetooth-Course"

But im facing following errors in segger embedded studio. 

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Building ‘ble_app_template_pca10040_s132’ from solution ‘ble_app_template_pca10040_s132’ in configuration ‘Debug’

'Output/ble_app_template_pca10040_s132 Debug/Obj/thumb_crt0.o' is up to date

Output/ble_app_template_pca10040_s132 Debug/Obj/nrf_log_backend_rtt.o does not exist.

'Output/ble_app_template_pca10040_s132 Debug/Obj/nrf_log_backend_serial.o' is up to date

Compiling ‘nrf_log_backend_rtt.c’

'Output/ble_app_template_pca10040_s132 Debug/Obj/nrf_log_backend_uart.o' is up to date

User Include Directories property has changed.

Compiling ‘nrf_log_default_backends.c’

Output/ble_app_template_pca10040_s132 Debug/Obj/nrf_log_frontend.o does not exist.

Output/ble_app_template_pca10040_s132 Debug/Obj/nrf_log_str_formatter.o does not exist.

Compiling ‘nrf_log_str_formatter.c’

Compiling ‘nrf_log_frontend.c’

sdk_common.h

nrf_log_frontend.c

'NRF_LOG_STR_PUSH_BUFFER_SIZE' undeclared here (not in a function); did you mean 'NRF_CLI_PRINTF_BUFF_SIZE'?

in definition of macro '_SELECT_ASSERT_FUNC'

in expansion of macro 'STATIC_ASSERT_SIMPLE'

in expansion of macro 'STATIC_ASSERT'

in expansion of macro 'IS_POWER_OF_TWO'

in expansion of macro 'NRF_RINGBUF_DEF'

expression in static assertion is not an integer

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Building ‘ble_app_template_pca10040_s132’ from solution ‘ble_app_template_pca10040_s132’ in configuration ‘Debug’
  'Output/ble_app_template_pca10040_s132 Debug/Obj/thumb_crt0.o' is up to date
  Output/ble_app_template_pca10040_s132 Debug/Obj/nrf_log_backend_rtt.o does not exist.
  'Output/ble_app_template_pca10040_s132 Debug/Obj/nrf_log_backend_serial.o' is up to date
  Compiling ‘nrf_log_backend_rtt.c’
  'Output/ble_app_template_pca10040_s132 Debug/Obj/nrf_log_backend_uart.o' is up to date
  User Include Directories property has changed.
  Compiling ‘nrf_log_default_backends.c’
  Output/ble_app_template_pca10040_s132 Debug/Obj/nrf_log_frontend.o does not exist.
  Output/ble_app_template_pca10040_s132 Debug/Obj/nrf_log_str_formatter.o does not exist.
  Compiling ‘nrf_log_str_formatter.c’
  Compiling ‘nrf_log_frontend.c’
    sdk_common.h
    nrf_log_frontend.c
    'NRF_LOG_STR_PUSH_BUFFER_SIZE' undeclared here (not in a function); did you mean 'NRF_CLI_PRINTF_BUFF_SIZE'?
    in definition of macro '_SELECT_ASSERT_FUNC'
    in expansion of macro 'STATIC_ASSERT_SIMPLE'
    in expansion of macro 'STATIC_ASSERT'
    in expansion of macro 'IS_POWER_OF_TWO'
    in expansion of macro 'NRF_RINGBUF_DEF'
    expression in static assertion is not an integer
    in definition of macro '_SELECT_ASSERT_FUNC'
    in expansion of macro 'STATIC_ASSERT_SIMPLE'
    in expansion of macro 'STATIC_ASSERT'
    in expansion of macro 'IS_POWER_OF_TWO'
    in expansion of macro 'NRF_RINGBUF_DEF'
  Output/ble_app_template_pca10040_s132 Debug/Obj/app_button.o does not exist.
  Compiling ‘app_button.c’
  'Output/ble_app_template_pca10040_s132 Debug/Obj/app_error.o' is up to date
  'Output/ble_app_template_pca10040_s132 Debug/Obj/app_error_handler_gcc.o' is up to date
  Output/ble_app_template_pca10040_s132 Debug/Obj/app_error_weak.o does not exist.
  Compiling ‘app_error_weak.c’
  Output/ble_app_template_pca10040_s132 Debug/Obj/app_scheduler.o does not exist.
  Output/ble_app_template_pca10040_s132 Debug/Obj/app_timer.o does not exist.
  Compiling ‘app_timer.c’
  Compiling ‘app_scheduler.c’
Build failed

Can you help resolve this issue.