upgrade to flask2

code/app.py

@@ -13,7 +13,7 @@ from revprox import ReverseProxied
 from utils import *
 
 
-__FLEES_VERSION__ = "20191031.0"
+__FLEES_VERSION__ = "20211018.0"
 app = Flask(__name__)
 app.config.from_object(__name__)
 config_values = read_config(app)
@@ -575,7 +575,7 @@ def download_direct(name,token,filename):
         "filename": file_path,
         "operation": "direct_download"
     })
-    return send_from_directory(directory=share['path'], filename=filename)
+    return send_from_directory(directory=share['path'], path=filename)
 
 
 @app.route('/download/gui/<name>/<path:filename>', methods=['GET'])
@@ -843,7 +843,7 @@ def download_file(name, filename, token = None):
         "filename": file_path,
         "operation": "download"
     })
-    return send_from_directory(directory=share['path'], filename=filename)
+    return send_from_directory(directory=share['path'], path=filename)
 
 
 def file_versionize(full_path):