ReflectionException occured for Faryshta widget

[IntegrityFoundation]

I am using Yii2 basic application template and I have hosted the software files on my VPS server. I have installed composer and also updated. When I start to run the application it shows the error as below:

ReflectionException
Class app\assets\DisableSubmitButtonsAsset does not exist

[1Luc1]

the readme has a misspelling.
should be:

use faryshta\disableSubmitButtons\Asset as DisableSubmitButtonAsset;

class AppAsset extends yii\web\AssetBundle
{
    public $depends = [
        DisableSubmitButtonAsset::class, // <-- this line
        // other dependencies
    ];
}