عدو اتصال به دیتابیس در زمان آپلود پروژه رو سرور

سلام ، من پروژه رو ، رو هاست آپلود کردم ، ولی به دیتابیس متصل نمیشه

Illuminate \ Database \ QueryException
Constructor failed (SQL: select * from `category` where `parent_id` = 0)

/home2/jeejowir/domains/jeejow.ir/public_html/demo/vendor/laravel/framework/src/Illuminate/Database/Connection.php

• @param array $bindings
• @param \Closure $callback
• @return mixed

• @throws \Illuminate\Database\QueryException
  */
  protected function runQueryCallback($query, $bindings, Closure $callback)
  {
  // To execute the statement, we'll simply call the callback, which will actually
  // run the SQL against the PDO connection. Then we can calculate the time it
  // took to execute and log the query SQL, bindings and time in our memory.
  try {
  $result = $callback($query, $bindings);
  }

  // If an exception occurs when attempting to run a query, we'll format the error
  // message to include the bindings with SQL, which will make this exception a
  // lot more helpful to the developer instead of just the database's errors.
  catch (Exception $e) {
      throw new QueryException(
          $query, $this->prepareBindings($bindings), $e
      );
  }
  
  return $result;

  }