Simple Machine Forum - Blank Screen on Load / Switching Pages

[ThyRaven]

log for subdomain.domain.com-error.log shows:

[Sat Sep 12 21:47:30 2015] [error] [client 62.24.181.135] File does not exist: /var/sentora/hostdata/brt/public_html/de-14_bigracktech_com/robots.txt, referer: http://de-14.bigracktech.com/robots.txt
[Sat Sep 12 21:49:13 2015] [error] [client 62.24.181.134] File does not exist: /var/sentora/hostdata/brt/public_html/de-14_bigracktech_com/robots.txt, referer: http://de-14.bigracktech.com/robots.txt
[Sat Sep 12 21:52:50 2015] [error] [client 62.24.181.135] File does not exist: /var/sentora/hostdata/brt/public_html/de-14_bigracktech_com/robots.txt, referer: http://de-14.bigracktech.com/robots.txt
[Fri Sep 18 05:51:46 2015] [error] [client 78.46.174.197] File does not exist: /var/sentora/hostdata/brt/public_html/de-14_bigracktech_com/robots.txt
[Fri Sep 18 10:39:07 2015] [error] [client 89.163.148.58] File does not exist: /var/sentora/hostdata/brt/public_html/de-14_bigracktech_com/robots.txt

nothing in any of the logs found at /var/logs/httpd

what next?