Installing NSP files of games you do not own will lead to a permanent console ban if you connect to Nintendo's official servers. Always use a blanked prodinfo (Exosphere) and DNS redirection (90DNS or Atmosphere DNS MITM) to block Nintendo telemetry.
NSP File Extension - What is a NSP file and how do I open a NSP File update 105 v262144nsp region usa 01006
Re-download the file and use a reliable transfer method like DBI's MTP responder. Safety and Precautionary Measures Installing NSP files of games you do not