<br />
<b>Warning</b>:  Uncaught ErrorException: require_once(/var/www/html/demos/interactive/../../tests/ViewTester.php): failed to open stream: No such file or directory in /var/www/html/demos/interactive/modal.php:5
Stack trace:
#0 /var/www/html/demos/interactive/modal.php(5): atk4\ui\App::atk4\ui\{closure}(2, 'require_once(/v...', '/var/www/html/d...', 5, Array)
#1 /var/www/html/demos/interactive/modal.php(5): require_once()
#2 {main}
  thrown in <b>/var/www/html/demos/interactive/modal.php</b> on line <b>5</b><br />
<br />
<b>Fatal error</b>:  main(): Failed opening required '/var/www/html/demos/interactive/../../tests/ViewTester.php' (include_path='.:/usr/local/lib/php') in <b>/var/www/html/demos/interactive/modal.php</b> on line <b>5</b><br />

!! ATK4 UI ERROR: Headers already sent, more headers can not be set at this stage. !!