SDK14.0.0 is missing a couple of error codes:
diff --git a/nRF5_SDK/components/libraries/strerror/nrf_strerror.c b/nRF5_SDK/components/libraries/strerror/nrf_strerror.c
--- a/nRF5_SDK/components/libraries/strerror/nrf_strerror.c
+++ b/nRF5_SDK/components/libraries/strerror/nrf_strerror.c
@@ -93,6 +93,8 @@ static nrf_strerror_desc_t const nrf_strerror_array[] =
NRF_STRERROR_ENTITY(NRF_ERROR_FORBIDDEN),
NRF_STRERROR_ENTITY(NRF_ERROR_INVALID_ADDR),
NRF_STRERROR_ENTITY(NRF_ERROR_BUSY),
+ NRF_STRERROR_ENTITY(NRF_ERROR_CONN_COUNT),
+ NRF_STRERROR_ENTITY(NRF_ERROR_RESOURCES),
/* SDK Common errors */
NRF_STRERROR_ENTITY(NRF_ERROR_MODULE_NOT_INITIALZED),