A message body reader not found for api.model.content.Space and MIME media type text/html

[Ana Scotti]

GET space fails with during response deserialization. It seems response code is < 300 and jersey tries to get entity as com.atlassian.confluence.api.model.content.Space but Content-type is text/xml.

com.sun.jersey.api.client.ClientHandlerException: A message body reader for Java class com.atlassian.confluence.api.model.content.Space, and Java type class com.atlassian.confluence.api.model.content.Space, and MIME media type text/html; charset=UTF-8 was not found
	at com.sun.jersey.api.client.ClientResponse.getEntity(ClientResponse.java:630)
	at com.sun.jersey.api.client.ClientResponse.getEntity(ClientResponse.java:586)
	at com.sun.jersey.api.client.WebResource.handle(WebResource.java:686)
	at com.sun.jersey.api.client.WebResource.get(WebResource.java:193)
	at com.atlassian.confluence.rest.client.AbstractRemoteService.getOption(AbstractRemoteService.java:181)
	at com.atlassian.confluence.rest.client.AbstractRemoteService.lambda$getFutureOption$1(AbstractRemoteService.java:77)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)

Client call:

remoteSpaceService.find()
        .withKeys(spaceKey).fetchOne().claim()

This code is from confluence-publisher jenkins plugin, and I'm trying to figure where the problem really lies, and in what cases the api could respond with http code 2xx but text/html content? 

When i try the following curl i get a valid json response, using the same basic auth user used by the plugin:

curl -i -X GET -H "Authorization: Basic *********" https://myconfluence.com/rest/api/space?spaceKey=SpaceA

HTTP/2 200