Duplicate Database server in oracle 11g Listner is started but when connecting sqlplus / as sysdba tnsprotocol error

Hi I want a to build Duplicate Database server in oracle 11g with rman duplicate feature I install software only not full database during installation. Listner is started but when connecting sqlplus / as sysdba get this error ORA-12560: TNS:protocol adaptor error OS is Windows Server 2012 R2