Managed File Transfer

I tried to decrypt text file using Native PGP.. i written the below BP.. while executing i got this error.. Please let me know.. what mistake i made

Error retrieving PGP Secret Key details: No PGP Secret Key details found 
associated with the KeyID: 0x2143E53E8C23E5E7 

<process name="NativePGP_DecryptionTest">
<sequence name="Main">
  <operation name="PGP Unpackage Service">
     <participant name="PGPUnpackageService"/>
     <output message="PGPUnpackageServiceTypeInputMessageOut">
              <assign to="." from="*"></assign>
              <assign to="profile_name">TestPGPProfile</assign> 
              <assign to="secret_keymap_name">TestNativeSecretKey</assign>
     </output>
    <input message="PGPUnpackageServiceTypeInputMessageIn">
              <assign to="." from="*"></assign>
    </input>
  </operation>
  </sequence>
</process>

<quillbot-extension-portal></quillbot-extension-portal>