https://osf.io/search/?q=computational%20audiology&page=1

start: Very good, this is the value of 'start', right out of the JSON-data
level2: This is the first value of key in the 'level1'-array
id: 11111, type: aaaa
level2: This is the second value of key in the 'level1'-array
id: 222, type: bbbb
level2: This is the third value of key in the 'level1'-array
id: 33333333, type: aaaa
level2: This is the fourth value of key in the 'level1'-array
id: 4444, type: aaaa

json mock_data (lokaal)

We have a Problem with JSON here:
Either we got no JSON from the API. Or the basenode-parameter is not ok.
Switch on the Debugmode of the Plugin!