Call to undefined function get_header() in index.php on test server

[ciacciojon9999]

[05-Nov-2018 23:48:47 UTC] PHP Fatal error: Uncaught Error: Call to undefined function get_header() in /web/test/wp-content/themes/ufclas-2020/index.php:18
Stack trace:
#0 {main}
thrown in /web/test/wp-content/themes/ufclas-2020/index.php on line 18
[05-Nov-2018 23:48:47 UTC] PHP Fatal error: Uncaught Error: Call to undefined function get_header() in /web/test/wp-content/themes/ufclas-2020/index.php:18
Stack trace:
#0 {main}
thrown in /web/test/wp-content/themes/ufclas-2020/index.php on line 18
[05-Nov-2018 23:48:50 UTC] PHP Fatal error: Uncaught Error: Call to undefined function get_header() in /web/test/wp-content/themes/ufclas-2020/index.php:18
Stack trace:
#0 {main}
thrown in /web/test/wp-content/themes/ufclas-2020/index.php on line 18
[05-Nov-2018 23:48:50 UTC] PHP Fatal error: Uncaught Error: Call to undefined function get_header() in /web/test/wp-content/themes/ufclas-2020/index.php:18
Stack trace:
#0 {main}
thrown in /web/test/wp-content/themes/ufclas-2020/index.php on line 18
[05-Nov-2018 23:48:52 UTC] PHP Fatal error: Uncaught Error: Call to undefined function get_header() in /web/test/wp-content/themes/ufclas-2020/index.php:18
Stack trace:
#0 {main}
thrown in /web/test/wp-content/themes/ufclas-2020/index.php on line 18
[05-Nov-2018 23:48:53 UTC] PHP Fatal error: Uncaught Error: Call to undefined function get_header() in /web/test/wp-content/themes/ufclas-2020/index.php:18
Stack trace:
#0 {main}
thrown in /web/test/wp-content/themes/ufclas-2020/index.php on line 18
[05-Nov-2018 23:48:55 UTC] PHP Fatal error: Uncaught Error: Call to undefined function get_header() in /web/test/wp-content/themes/ufclas-2020/index.php:18
Stack trace:
#0 {main}
thrown in /web/test/wp-content/themes/ufclas-2020/index.php on line 18
[05-Nov-2018 23:48:55 UTC] PHP Fatal error: Uncaught Error: Call to undefined function get_header() in /web/test/wp-content/themes/ufclas-2020/index.php:18
Stack trace:
#0 {main}
thrown in /web/test/wp-content/themes/ufclas-2020/index.php on line 18