GET /operations/$HANDLE?output=JSON is not json

[ekodo at posteo.eu]

Hello,

i started a deep-check over the web API and set an ophandle 
(96a1be642bfeed6d).

When i try to get a status with:

curl -X GET -d "output=json" 
http://127.0.0.1:3456/operations/96a1be642bfeed6d

The output format is not json like expected.



There is always a raw output:
Content-Type: text/plain;charset=utf-8
Server: TwistedWeb/15.4.0


UnrecoverableFileError: the directory (or mutable file) could not be 
retrieved, because there were insufficient good shares. This might 
indicate that no servers were connected, insufficient servers were 
connected, the URI was corrupt, or that shares have been lost due to 
server departure, hard drive failure, or disk corruption. You should 
perform a filecheck on this object to learn more.