jos-Error: Application Instantiation Error

JFactory :: getApplication() @ /home/mexicoco/public_html/index.php:27
JApplication :: getInstance() @ /home/mexicoco/public_html/libraries/joomla/factory.php:102
JSite -> __construct() @ /home/mexicoco/public_html/libraries/joomla/application/application.php:180
JApplication -> __construct() @ /home/mexicoco/public_html/includes/application.php:47
JApplication -> _createSession() @ /home/mexicoco/public_html/libraries/joomla/application/application.php:145
JFactory :: getSession() @ /home/mexicoco/public_html/libraries/joomla/application/application.php:1020
JFactory :: createSession() @ /home/mexicoco/public_html/libraries/joomla/factory.php:152
JSession :: getInstance() @ /home/mexicoco/public_html/libraries/joomla/factory.php:661
JSession -> __construct() @ /home/mexicoco/public_html/libraries/joomla/session/session.php:151
JSession -> _start() @ /home/mexicoco/public_html/libraries/joomla/session/session.php:114
session_start() @ /home/mexicoco/public_html/libraries/joomla/session/session.php:532
JSessionStorageDatabase -> read()
JDatabase -> loadResult() @ /home/mexicoco/public_html/libraries/joomla/session/storage/database.php:50
JDatabaseMySQL -> execute() @ /home/mexicoco/public_html/libraries/joomla/database/database.php:1138
JError :: raiseError() @ /home/mexicoco/public_html/libraries/joomla/database/database/mysql.php:548
JError :: raise() @ /home/mexicoco/public_html/libraries/joomla/error/error.php:251
JError :: throwError() @ /home/mexicoco/public_html/libraries/joomla/error/error.php:176
call_user_func_array() @ /home/mexicoco/public_html/libraries/joomla/error/error.php:214
JError :: handleCallback()
call_user_func() @ /home/mexicoco/public_html/libraries/joomla/error/error.php:765
JError :: customErrorPage()
JFactory :: getApplication() @ /home/mexicoco/public_html/libraries/joomla/error/error.php:784
JError :: raiseError() @ /home/mexicoco/public_html/libraries/joomla/factory.php:99
JError :: raise() @ /home/mexicoco/public_html/libraries/joomla/error/error.php:251
jos-Error: JDatabaseMySQL::query: 145 - Table './mexicoco_vision/mexico_session' is marked as crashed and should be repaired SQL=UPDATE `mexico_session` SET `data` = '' , `time` = '1480889938' WHERE `session_id` = 'f8ra0ekhqq91dhd3vfob5bo6v0'

JSession -> __destruct()
JSession -> close() @ /home/mexicoco/public_html/libraries/joomla/session/session.php:133
session_write_close() @ /home/mexicoco/public_html/libraries/joomla/session/session.php:676
JSessionStorageDatabase -> write()
JDatabaseMySQL -> execute() @ /home/mexicoco/public_html/libraries/joomla/session/storage/database.php:87
JError :: raiseError() @ /home/mexicoco/public_html/libraries/joomla/database/database/mysql.php:548
JError :: raise() @ /home/mexicoco/public_html/libraries/joomla/error/error.php:251