Hi, I always get the the error message "#if with no expression" wthin line 74 of the header file: src/nimble/esp_port/port/include/esp_nimble_cfg.h Line 74: 74 | #if CONFIG_BT_NIMBLE_ENABLED It seems it has to be #ifdef CONFIG_BT_NIMBLE_ENABLED can someone confirm that? Or does it have to be "#ifndef" ?