Example not working

[labmaster]

When i try the example code (without any Modification) i only get the following error at the serial monitor:

rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT) configsip: 0, SPIWP:0xee clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00 mode:DIO, clock div:2 load:0x3fff0030,len:1184 load:0x40078000,len:13232 load:0x40080400,len:3028 entry 0x400805e4 [ 287][E][Preferences.cpp:503] getBytesLength(): nvs_get_blob len fail: bleAddress NOT_FOUND [ 287][E][NukiBle.cpp:939] retrieveCredentials(): Error getting data from NVS [ 296][E][Preferences.cpp:503] getBytesLength(): nvs_get_blob len fail: bleAddress NOT_FOUND [ 299][E][NukiBle.cpp:939] retrieveCredentials(): Error getting data from NVS [ 807][E][Preferences.cpp:503] getBytesLength(): nvs_get_blob len fail: bleAddress NOT_FOUND [ 807][E][NukiBle.cpp:939] retrieveCredentials(): Error getting data from NVS [ 1311][E][Preferences.cpp:503] getBytesLength(): nvs_get_blob len fail: bleAddress NOT_FOUND [ 1312][E][NukiBle.cpp:939] retrieveCredentials(): Error getting data from NVS [ 1815][E][Preferences.cpp:503] getBytesLength(): nvs_get_blob len fail: bleAddress NOT_FOUND [ 1816][E][NukiBle.cpp:939] retrieveCredentials(): Error getting data from NVS [ 2319][E][Preferences.cpp:503] getBytesLength(): nvs_get_blob len fail: bleAddress NOT_FOUND [ 2320][E][NukiBle.cpp:939] retrieveCredentials(): Error getting data from NVS ...

Any Hint where to search ?