Update app.py

app.py

@@ -5,6 +5,11 @@ import inspect
 import traceback
 import gradio as gr
 from b2sdk.v2 import *
+# Newer b2sdk versions no longer export the exceptions through "import *": import it by name
+try:
+    from b2sdk.v2.exception import NonExistentBucket
+except ImportError:
+    from b2sdk.exception import NonExistentBucket
 import dropbox
 import gspread
 import gspread.exceptions