I am building web app with Flask and Pyinstaller to build a single executable and i have the following problem:

• Run by simply running "Python app.py" everything works fine. But after building the .exe file with Pyinstaller, the javascript code in the html file that has the function to check whether the created file exists or not, can't route to that file path even though the file exists, I tried manually enter the path to the file in the URL bar but the path cannot be found error,
• Does building the python executable with Pyinstaller not route the newly created file? And is there any solution to fix it?

  var http = new XMLHttpRequest();
  http.open('HEAD', "/static/" + name_file_rc + ".avi", false);
  http.send();
  if (http.status === 200){
     allow_download = true;
     $('#remove_download').show();
     $('#download').show();                                                      
     $('#frame_record,#second,#size_file,#title_size_file,#title_second').show();
     Flag_stop_record_by_err = false;
     clearInterval(allow_download_inter);
     clearTimeout(timeout_download);
  }
  else{
     allow_download = false;
     // console.log("Load file fail");
  }
  

• Thank you all for viewing my problem and looking forward to your help.