getting error

I am getting below error, in my cpanel error logs,

I am unable to do much work in wp-admin, after few clicks it goes like unable to connect to database,
I am one a 15$ per month cloud server bluehost

[Sun Mar 06 23:34:43 2016] [error] [client 197.88.72.20] ModSecurity: Rule 7fe43d8f6fd0 [id "340157"][file "/etc/httpd/modsecurity.d/10_asl_rules.conf"][line "406"] - Execution error - PCRE limits exceeded (-8): (null). [hostname "hashgroups.com"] [uri "/wp-admin/admin-ajax.php"] [unique_id "Vt0hA6KQEDUAADmsWbIAAABF"]
[Sun Mar 06 23:34:43 2016] [error] [client 197.88.72.20] ModSecurity: Rule 7fe43c56a680 [id "340181"][file "/etc/httpd/modsecurity.d/10_asl_rules.conf"][line "411"] - Execution error - PCRE limits exceeded (-8): (null). [hostname "hashgroups.com"] [uri "/wp-admin/admin-ajax.php"] [unique_id "Vt0hA6KQEDUAADmsWbIAAABF"]