My site stopped sending email notifications ..
I checked cron here , if it be true address : http://site.com/ow_cron/run.php
and it shows below error message :
OW Debug - Warning
Message: usort() expects parameter 2 to be a valid callback, no array or string given
File: /home/site/public_html/ow_core/plugin_manager.php
Line: 112
OW Debug - Exception
Message: SQLSTATE[HY000]: General error: 126 Incorrect key file for table './pals2/ow_base_cron_job.MYI'; try to repair it
File: /home/site/public_html/ow_core/database.php
Line: 723
Trace:
#0 /home/site/public_html/ow_core/database.php(723): PDOStatement->execute()
#1 /home/site/public_html/ow_core/database.php(640): OW_Database->execute('REPLACE INTO `o...')
#2 /home/site/public_html/ow_system_plugins/base/bol/cron_job_dao.php(84): OW_Database->batchInsertOrUpdateObjectList('ow_base_cron_jo...', Array)
#3 /home/site/public_html/ow_system_plugins/base/bol/cron_service.php(71): BOL_CronJobDao->batchSave(Array)
#4 /home/site/public_html/ow_cron/run.php(124): BOL_CronService->batchSave(Array)
#5 {main}
Type: PDOException
Please guide me how to fix this issue