Error creating directory_debug/obj

Dear all,

i building the example light_switch_server_nrf52832_xxAA_S132_7.2.0 from solution light_switch_server_nrf52832_xxAA_S132_7.2.0 in configuration Debug (SDK nRF5) but there is an error creating directory light_switch_server_nrf52832_xxAA_S132_7.2.0_Debug/obj...

What does it mean? 

Thanks in advance

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