[27-Jun-2016 20:00:26] FEHLER: Dropbox-API: (504) Invalid response.

Hi
1. Thanks for this great Plugin

As you can see in the Title i got an e-mail with the last backuphistory
and in the long text of what happend …
” [27-Jun-2016 20:00:26] FEHLER: Dropbox-API: (504) Invalid response.”
was written..
at the very end this was written …
” [27-Jun-2016 20:02:56] FEHLER: Job mit Fehlern beendet in 175 Sekunden. Um eine korrekte Ausführung zu gewährleisten, musst du die Fehler beheben.”

translated …

” [27-Jun-2016 20:02:56]ERROR: Job finished with errors in 175 seconds. To guarantee a corect execution you must solve those errors.”

——-

As i checked the folder on the dropbox-side of things everthing was there.
Any ideas?
Thanks

https://wordpress.org/plugins/backwpup/