facebook.getGroupFeed dosn't work

[Francesco Viscomi]

Hi all, i'm new to facebook4j, i've tried to use

 ResponseList<Post> feeds = facebook.getGroupFeed("davolinews",new Reading().limit(25));

but i receive:

Exception in thread "main" message - (#803) Some of the aliases you requested do not exist: davolinews
code - 803
Relevant information for error recovery can be found on the Facebook Developers Document:
    https://developers.facebook.com/docs/graph-api/using-graph-api/#errors

FacebookException{statusCode=404, errorType='OAuthException', errorMessage='(#803) Some of the aliases you requested do not exist: davolinews', errorCode=803, errorSubcode=-1, version=2.4.10}
    at facebook4j.internal.http.HttpClientImpl.request(HttpClientImpl.java:179)
    at facebook4j.internal.http.HttpClientWrapper.request(HttpClientWrapper.java:61)
    at facebook4j.internal.http.HttpClientWrapper.get(HttpClientWrapper.java:89)
    at facebook4j.FacebookImpl.get(FacebookImpl.java:2864)
    at facebook4j.FacebookImpl.getGroupFeed(FacebookImpl.java:1110)
    at unicredit.facebook.PostsFromPageExtractor.main(PostsFromPageExtractor.java:43)



while the group exist on facebook
https://www.facebook.com/groups/davolinews/

How i can discover which problem is this and how to solve it?
thx
Francesco