input file error

Getting the following cron job error 'Could not open input file: /home/username/public_html/site/periodic.cron.php'

update cron line:

periodic.cron.php

to:

periodic/cron.php

Changed that, now says in progress but nothing happening getting 2 erros now

1#

Database error in <SiteName>

Database error in

Query:

SELECT `unit`, `action`, `handler_id` FROM `sys_alerts`

Mysql error: Table 'btkgeexq_community.sys_alerts' doesn't exist

Found error in the file '/home/username/public_html/mysite/inc/classes/BxDolAlerts.php' at line 121.
Called 'db_res' function with erroneous argument #0.

(this is just the first bit of the error log its massive)

2#

Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 26556063 bytes) in /usr/local/cpanel/base/horde/lib/Horde/Text/Filter.php on line 83#

Thank