Yii2 - MemCache. Turning on problem?

Question

Yii

I have a problem using MemCache.
I am developing a site on Yii2, the server is OpenServer. OS - Windows 10.
After enabling MemCache:

'cache' => [
     'class' => 'yii\caching\MemCache',
     'useMemcached' => true,
],

And in OpenServer -> settings -> Modules, I also included it.
But I get this error:
"MemCache requires PHP memcached extension to be loaded."
And I do not know what to do, tell me please. Thank you very much in advance)