OpenSSL Error generate Certificates "Error checking extension section default"

Question: OpenSSL error: Error checking extension section default
405703A1CE7F0000:error:11000082:X509 V3 routines:do_ext_nconf:unknown extension name:../crypto/x509/v3_conf.c:88:
405703A1CE7F0000:error:11000080:X509 V3 routines:X509V3_EXT_nconf_int:error in extension:../crypto/x509/v3_conf.c:48:section=default, name=authoritykeyIdentifier, value=keyid,issuer


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Answer: Chances you miss-typed something. The File should be,

authorityKeyIdentifier=keyid,issuer
basicConstraints=CA:FALSE
keyUsage = digitalSignature, nonRepudiation, keyEncipherment, dataEncipherment

[alt_names]
DNS.1 = myservername.local