Failed Ajax request or invalid JSON returned. (Navigation menus)

image

Error appears when I edit item in navigation menu


Error Log

Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; ADODB_Cache_File has a deprecated constructor in /home/venturi/public_html/ojs/lib/pkp/lib/adodb/adodb.inc.php on line 263

Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; ADOConnection has a deprecated constructor in /home/venturi/public_html/ojs/lib/pkp/lib/adodb/adodb.inc.php on line 359

Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; ADORecordSet has a deprecated constructor in /home/venturi/public_html/ojs/lib/pkp/lib/adodb/adodb.inc.php on line 2921

Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; ADORecordSet_array has a deprecated constructor in /home/venturi/public_html/ojs/lib/pkp/lib/adodb/adodb.inc.php on line 3939

Warning: ini_set(): Headers already sent. You cannot change the session module’s ini settings at this time in /home/venturi/public_html/ojs/lib/pkp/classes/session/SessionManager.inc.php on line 35

Warning: ini_set(): Headers already sent. You cannot change the session module’s ini settings at this time in /home/venturi/public_html/ojs/lib/pkp/classes/session/SessionManager.inc.php on line 36

Warning: ini_set(): Headers already sent. You cannot change the session module’s ini settings at this time in /home/venturi/public_html/ojs/lib/pkp/classes/session/SessionManager.inc.php on line 37

Warning: ini_set(): Headers already sent. You cannot change the session module’s ini settings at this time in /home/venturi/public_html/ojs/lib/pkp/classes/session/SessionManager.inc.php on line 38

Warning: ini_set(): Headers already sent. You cannot change the session module’s ini settings at this time in /home/venturi/public_html/ojs/lib/pkp/classes/session/SessionManager.inc.php on line 39

Warning: ini_set(): Headers already sent. You cannot change the session module’s ini settings at this time in /home/venturi/public_html/ojs/lib/pkp/classes/session/SessionManager.inc.php on line 40

Warning: ini_set(): Headers already sent. You cannot change the session module’s ini settings at this time in /home/venturi/public_html/ojs/lib/pkp/classes/session/SessionManager.inc.php on line 41

Warning: ini_set(): Headers already sent. You cannot change the session module’s ini settings at this time in /home/venturi/public_html/ojs/lib/pkp/classes/session/SessionManager.inc.php on line 42

Warning: ini_set(): Headers already sent. You cannot change the session module’s ini settings at this time in /home/venturi/public_html/ojs/lib/pkp/classes/session/SessionManager.inc.php on line 43

Warning: ini_set(): Headers already sent. You cannot change the session module’s ini settings at this time in /home/venturi/public_html/ojs/lib/pkp/classes/session/SessionManager.inc.php on line 45

Warning: session_set_save_handler(): Cannot change save handler when headers already sent in /home/venturi/public_html/ojs/lib/pkp/classes/session/SessionManager.inc.php on line 53

Warning: session_start(): Cannot start session when headers already sent in /home/venturi/public_html/ojs/lib/pkp/classes/session/SessionManager.inc.php on line 58

Deprecated: The each() function is deprecated. This message will be suppressed on further calls in /home/venturi/public_html/ojs/lib/pkp/lib/adodb/adodb.inc.php on line 1003
DB Error: Duplicate entry ‘’ for key ‘sessions_pkey’
Stack Trace:
File: /home/venturi/public_html/ojs/lib/pkp/classes/session/SessionDAO.inc.php line 78
Function: DAO->update(“INSERT INTO sessions (session_id, ip_address, user_agent, cr…”, Array(8))

File: /home/venturi/public_html/ojs/lib/pkp/classes/session/SessionManager.inc.php line 89
Function: SessionDAO->insertObject(Object(Session))

File: /home/venturi/public_html/ojs/lib/pkp/classes/session/SessionManager.inc.php line 129
Function: SessionManager->__construct(Object(SessionDAO), Object(Request))

File: /home/venturi/public_html/ojs/lib/pkp/classes/security/Validation.inc.php line 371
Function: SessionManager::getManager()

File: /home/venturi/public_html/ojs/lib/pkp/classes/core/PKPPageRouter.inc.php line 66
Function: Validation::isLoggedIn()

File: /home/venturi/public_html/ojs/lib/pkp/classes/core/Dispatcher.inc.php line 117
Function: PKPPageRouter->isCacheable(Object(Request))

File: /home/venturi/public_html/ojs/lib/pkp/classes/core/PKPApplication.inc.php line 252
Function: Dispatcher->dispatch(Object(Request))

File: /home/venturi/public_html/ojs/index.php line 68
Function: PKPApplication->execute()


My site:http://institutoventuri.com/ojs/index.php/firs/

Would anyone have an idea of what I can do?