Hi when I transfered my site online, after 1day working normaly appeared following error:
Error displaying the error page: Application Instantiation Error: Error initialising the session.
And I have to transfer again for it starts working
Help me please !!!

Expected result

Site [http://takfa-as.co.nf] works fine with and without login

Actual result

Actually I added following code into the file in libraries/cms/application/cms.php

jimport('joomla.log.log');
JLog::addLogger(array('text_file' => 'session_errors.php'));
JLog::add(
JText::_('JERROR_SESSION_STARTUP').
' Session State: '.$session->getState().
' Sql Error: '.$db->getErrorMsg()
);

And as a resultat in session_errors.php file displayed

#
#<?php die('Forbidden.'); ?>
#Date: 2016-07-29 11:54:17 UTC
#Software: Joomla Platform 13.1.0 Stable [ Curiosity ] 24-Apr-2013 00:00 GMT
#Fields: datetime priority clientip category message

2016-07-29T11:54:17+00:00 WARNING 78.193.156.57 deprecated JDatabase::getErrorMsg() is deprecated, use exception handling instead.
2016-07-29T11:54:17+00:00 INFO 78.193.156.57 - Error initialising the session. Session State: active Sql Error: INSERT command denied to user '2174879_takfaas'@'83.125.22.218' for table '#__session' SQL=INSERT INTO #__session
(session_id, client_id, time) VALUES
('2efe7a20d731859f3c55e2f2ec7c17fb', 0, '1469793257')
2016-07-29T11:54:18+00:00 WARNING 78.193.156.57 deprecated JDatabase::getErrorMsg() is deprecated, use exception handling instead.
2016-07-29T11:54:18+00:00 INFO 78.193.156.57 - Error initialising the session. Session State: active Sql Error: INSERT command denied to user '2174879_takfaas'@'83.125.22.218' for table '#__session' SQL=INSERT INTO #__session
(session_id, client_id, time) VALUES
('2efe7a20d731859f3c55e2f2ec7c17fb', 0, '1469793258')
2016-07-29T11:54:19+00:00 WARNING 78.193.156.57 deprecated JDatabase::getErrorMsg() is deprecated, use exception handling instead.
2016-07-29T11:54:19+00:00 INFO 78.193.156.57 - Error initialising the session. Session State: active Sql Error: INSERT command denied to user '2174879_takfaas'@'83.125.22.218' for table '#__session' SQL=INSERT INTO #__session
(session_id, client_id, time) VALUES
('2efe7a20d731859f3c55e2f2ec7c17fb', 0, '1469793259')
2016-07-29T11:54:20+00:00 WARNING 78.193.156.57 deprecated JDatabase::getErrorMsg() is deprecated, use exception handling instead.
2016-07-29T11:54:20+00:00 INFO 78.193.156.57 - Error initialising the session. Session State: active Sql Error: INSERT command denied to user '2174879_takfaas'@'83.125.22.218' for table '#__session' SQL=INSERT INTO #__session
(session_id, client_id, time) VALUES
('2efe7a20d731859f3c55e2f2ec7c17fb', 0, '1469793260')
2016-07-29T11:56:44+00:00 WARNING 78.193.156.57 deprecated JDatabase::getErrorMsg() is deprecated, use exception handling instead.
2016-07-29T11:56:44+00:00 INFO 78.193.156.57 - Error initialising the session. Session State: active Sql Error: INSERT command denied to user '2174879_takfaas'@'83.125.22.218' for table '#__session' SQL=INSERT INTO #__session
(session_id, client_id, time) VALUES
('2efe7a20d731859f3c55e2f2ec7c17fb', 0, '1469793404')

System information (as much as possible)

PHP Version 5.5.38
System Linux f15.runhosting.com 4.4.15nopreempt #1 SMP Wed Jul 13 17:10:30 EEST 2016 x86_64

Additional comments

Help me please !!!