This error seems to be related to the CodeIgniter database config (application/config/database.php):
Code:
$db['default']['stricton'] = TRUE;
If this is defined as TRUE, then I also get the same errors as yourself.
If you were to update the database table 'user_login_sessions' with the following sql statement it would fix this particular error message.
Code:
ALTER TABLE `user_login_sessions`
MODIFY COLUMN `usess_series` varchar(40) CHARACTER SET latin1 COLLATE latin1_swedish_ci NOT NULL DEFAULT '' AFTER `usess_uacc_fk`;
However, you will then receive other errors for other table columns that also do not have a default value defined.
So your options are, either update your CI database config as follows:
Code:
$db['default']['stricton'] = FALSE;
Or alternatively, you will need to go through all of the libraries database tables and define default values for each column.