helo,
Does the path /tmp/blob/ exists?
If not create it.

If yes, try to disable (comment-out) blob_path and tell me if the error
is still there.

i comment out the blob path and the error message disappear.
but i got 'timeout'  when i try to dtnping.
and the notice seems repeating this :
- new bundle queued
- bundle deleted
- bundle has been expired
- bundle received

it repeated again and again and dtnping still timeout.

thank you :)