Warning: Array to string conversion in C:\web\WSM\travered2019\live\include\engine.php on line 609

Fatal error: Uncaught TypeError: Illegal offset type in C:\web\WSM\travered2019\live\include\engine.php:609
Stack trace:
#0 C:\web\WSM\travered2019\live\urlmanager.php(3): include()
#1 {main}
  thrown in C:\web\WSM\travered2019\live\include\engine.php on line 609