ESP_ERROR_CHECK failed: esp_softap/main/esp_softap.c

[chrisMa68]

I (358) cpu_start: App cpu up.
I (376) heap_init: Initializing. RAM available for dynamic allocation:
I (383) heap_init: At 3FFAE6E0 len 00001920 (6 KiB): DRAM
I (389) heap_init: At 3FFB8EA8 len 00027158 (156 KiB): DRAM
I (395) heap_init: At 3FFE0440 len 00003AE0 (14 KiB): D/IRAM
I (402) heap_init: At 3FFE4350 len 0001BCB0 (111 KiB): D/IRAM
I (408) heap_init: At 4008FCC4 len 0001033C (64 KiB): IRAM
I (414) cpu_start: Pro cpu start user code
I (97) cpu_start: Starting scheduler on PRO CPU.
I (0) cpu_start: Starting scheduler on APP CPU.
DHCP server started 
ESP_ERROR_CHECK failed: esp_err_t 0x1101 (ESP_ERR_NVS_NOT_INITIALIZED) at 0x4008808c
Rebooting...

I fixed it:
add:
#include "nvs_flash.h"
and
nvs_flash_init();
at the beginn of the void app_main()