File Input installing issues

[emadalslahi]

kartik-v/yii2-widget-fileinput it was working well before updating and requiering for "yiisoft/yii2-bootstrap4": "@dev"

now it's does not showing the initial image .. update senario

also i cannot install "yiisoft/yii2-bootstrap4": "@dev" using composer >> it's say you cannot install this

how to show initial image...

field($model, 'myfile')->widget(FileInput::classname(), [ 'options' => [ 'accept' => 'image/*', 'multiple' => false, // 'disabled' => true ], 'pluginOptions' => [ 'initialPreview' => [ $priv, // Url::to('@front-end-imgs/' . $model->slider_image, true) ], 'initialPreviewAsData' => true, 'overwriteInitial' => true, 'showUpload' => true, 'browseLabel' => '', 'removeLabel' => '', 'cancelLabel' => '', 'mainClass' => '', ], ]) ?>

this is my code ...

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