Update files.py

web/admin/files/files.py

@@ -37,6 +37,8 @@ def index():
 @blueprint.route('/check_exists_files', endpoint='check_exists_files', methods=['POST'])
 @panel_login_required
 def check_exists_files():
+    from admin import session
+    
     dfile = request.form.get('dfile', '')
     filename = request.form.get('filename', '')
     data = []