PHP Fatal error: Uncaught Error: Class 'think\Route' not found in /fontandbehind/vendor/topthink/think-captcha/src/helper.php:12
Stack trace:
#0 /fontandbehind/vendor/composer/autoload_real.php(66): require()
#1 /fontandbehind/vendor/composer/autoload_real.php(56): composerRequire703880e5fb681e81ef2f117eb3d229eb('1cfd2761b63b0a2...', '/fontandbehind/ve...')
#2 /fontandbehind/vendor/autoload.php(7): ComposerAutoloaderInit703880e5fb681e81ef2f117eb3d229eb::getLoader()
#3 /fontandbehind/start.php(31): require_once('/home/wwwroot/d...')
#4 {main}
thrown in /fontandbehind/vendor/topthink/think-captcha/src/helper.php on line 12

我用的是tp5.1

helper.php里的报错代码
\think\Route::get('captcha/[:id]',"\\think\\captcha\\CaptchaController@index");