Appache httpcomponents.core cannot see required Commons codec classes

java.lang.NoClassDefFoundError: org/apache/commons/codec/binary/Base64
	at org.apache.httpcomponents.core//org.apache.http.impl.auth.BasicScheme.authenticate(BasicScheme.java:168)
	at org.apache.httpcomponents.core//org.apache.http.impl.auth.HttpAuthenticator.doAuth(HttpAuthenticator.java:239)
	at org.apache.httpcomponents.core//org.apache.http.impl.auth.HttpAuthenticator.generateAuthResponse(HttpAuthenticator.java:218)
	at org.apache.httpcomponents.core//org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:262)
	at org.apache.httpcomponents.core//org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:184)
	at org.apache.httpcomponents.core//org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:88)
	at org.apache.httpcomponents.core//org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110)
	at org.apache.httpcomponents.core//org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:184)
	at org.apache.httpcomponents.core//org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:71)