PUT does not stop to load

BTW, I meant the latest version of the HTTP class. That is the one that was fixed to solve this problem. You need to upgrade that class.

Authentication window comes up, after enter linkedin email and password. I am getting error. API is it add a member to a group.

api.linkedin.com/v1/people/~/group- ...

["debug"]=>
int(1)
["debug_http"]=>
int(1)
["exit"]=>
bool(false)
["debug_output"]=>
string(5976) "OAuth client: Checking the OAuth token authorization state
OAuth client: The OAuth token is not yet authorized
OAuth client: Checking the OAuth token and verifier
OAuth client: Accessing the OAuth access token at https://api.linkedin.com/uas/oauth/accessToken
OAuth client: Access token expiry: 2014-10-27 20:38:11 UTC
OAuth client: The OAuth token was authorized
OAuth client: Accessing the API call at https://api.linkedin.com/v1/people/~/group-memberships/4380946
OAuth client: Could not retrieve the OAuth access token. Error: it was not possible to access the API call: it was returned an unexpected response status 400 Response:
["debug_prefix"]=>
string(14) "OAuth client: "
["server"]=>
string(8) "LinkedIn"
["configuration_file"]=>
string(24) "oauth_configuration.json"
["request_token_url"]=>
string(61) "https://api.linkedin.com/uas/oauth/requestToken?scope={SCOPE}"
["dialog_url"]=>
string(47) "https://api.linkedin.com/uas/oauth/authenticate"
["offline_dialog_url"]=>
string(0) ""
["append_state_to_redirect_uri"]=>
string(0) ""
["access_token_url"]=>
string(46) "https://api.linkedin.com/uas/oauth/accessToken"
["oauth_version"]=>
string(4) "1.0a"
["url_parameters"]=>
bool(true)
["authorization_header"]=>
bool(true)
["token_request_method"]=>
string(3) "GET"
["signature_method"]=>
string(9) "HMAC-SHA1"

.....................

string(0) ""
["get_token_with_api_key"]=>
bool(false)
["scope"]=>
string(38) "r_fullprofile r_emailaddress rw_groups"
["offline"]=>
bool(false)
["access_token"]=>
string(36) "ed1baf02-ad56-4271-af45-a64a488a7448"
["access_token_secret"]=>
string(36) "0d42eb04-ac10-4f80-b38b-0991fdcfbae4"
["access_token_expiry"]=>
string(19) "2014-10-27 20:38:11"
["access_token_type"]=>
string(0) ""
["default_access_token_type"]=>
string(0) ""
["access_token_parameter"]=>
string(0) ""
["access_token_response"]=>
NULL
["store_access_token_response"]=>
bool(false)
["access_token_authentication"]=>
string(0) ""
["refresh_token"]=>
string(0) ""
["authorization_error"]=>
string(0) ""
["response_status"]=>
int(400)
["oauth_username"]=>
string(0) ""
["oauth_password"]=>
string(0) ""
["oauth_user_agent"]=>
string(70) "PHP-OAuth-API (http://www.phpclasses.org/oauth-api $Revision: 1.112 $)"

I need to see the whole debug output that goes to PHP error log file because includes the actual HTTP requests and response.

I suspect you are not sending the correct parameters that API call requires. Can you show the actual code you are using to define the parameters and call the API?

Yes. It is a mistake in the data array. Thanks for your help.