Fix Timezone Error on Site - 30/04/2018 10:35 EDT

I have an exchange script I just installed and am getting a few erros which could be due to a conflict with the version of curl and using the domain instead of the ip. Im not 100% sure though, just something I read. Whenever I get access to pages of frontend, I meet the following erros and the the page just appears blank: [Mon Apr 30 10:03:23.521727 2018] [:error] [pid 1661] [client [login to view URL]] PHP Notice: Undefined property: object::$default_timezone in /var/www/html/frontend/lib/[login to view URL] on line 92 [Mon Apr 30 10:03:23.562787 2018] [:error] [pid 1661] [client [login to view URL]] PHP Notice: date_default_timezone_set(): Timezone ID '' is invalid in /var/www/html/frontend/lib/[login to view URL] on line 92 [Mon Apr 30 10:03:23.562863 2018] [:error] [pid 1661] [client [login to view URL]] PHP Notice: Undefined property: object::$default_timezone in /var/www/html/frontend/lib/[login to view URL] on line 93 [Mon Apr 30 10:03:23.563156 2018] [:error] [pid 1661] [client [login to view URL]] PHP Fatal error: Uncaught Exception: DateTimeZone::__construct(): Unknown or bad timezone () in /var/www/html/frontend/lib/[login to view URL]\nStack trace:\n#0 /var/www/html/frontend/lib/[login to view URL](93): DateTimeZone->__construct('')\n#1 /var/www/html/frontend/htdocs/[login to view URL](41): include('/var/www/html/f...')\n#2 {main}\n thrown in /var/www/html/frontend/lib/[login to view URL] on line 93