Fix What Makes Our Website Go Down

Our website is: [login to view URL] We were previously on the CMS Joomla and from then, our website was constantly going down. I thought the cause might be Joomla and so I moved our CMS over to Wordpress. However, once or twice a week, the site goes down. The site is currently down and displaying the two errors below: [login to view URL] [login to view URL] Please quote the word "cooper" to be considered for this job. I know its not the host because we have a number of websites on the same host, Dreamhost, that don't go down. Your job is: * Figure out why our site keeps going down * Explain it to me. * Fix it * Explain to me what you did to fix it. That's it. ## Deliverables I will give the winning coder access to: * My Dreamhost Panel * FTP * Wordpress admin * MySQL Database * Authority to email my host. So we can permanently resolve this error. Thanks