ReflectionException (-1) Class App\Http\Controllers\Admin\Admincontroller does not exist

I have a website hosted in shared hosting space. After a long messy deployment, I tried to login into the system and now I am getting this error "ReflectionException (-1) Class App\Http\Controllers\Admin\Admincontroller does not exist". This persists in every route actions.

Already my public folder files are in public_html.

routes\web.php

Route::group(['middleware' => ['auth', 'admin'], 'prefix' => '/acumen'], function(){

    # index view for displaying admin section
    Route::get('/', 'Admin\Admincontroller@getIndexView')->name('admin.index');

I want the application working properly.

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