Are files not being uploaded to the server at the same time?

Question

Yii

I've been sitting all night, ready not to cook, help! Help me)
Here is such a controller:

public function actionUpdate($id) {
        $model = $this->findModel($id);
        if ($model->load(Yii::$app->request->post()) && $model->save()) {
            $model->image = UploadedFile::getInstance($model,'image');
            if( $model->image ) {
                $model->upload();
            }
            $mfile = UploadedFile::getInstance($model, 'file');
            $model->bookfile = $mfile->name;
            $ext = end((explode(".", $mfile->name)));
            $model->bookfile = Yii::$app->security->generateRandomString().".{$ext}";
            $path2 = Yii::getAlias('@webroot').'/upload/global/books/'.$model->bookfile;
            if($model->save()) {
                $mfile->saveAs($path2);
                return $this->redirect(['view', 'id' => $model->id]);
            } else {
                return false;
            }
            return $this->redirect(['view', 'id' => $model->id]);
        }
        else {
            return $this->render('update', compact('model'));
        }
    }

It's in the model:

public function rules() {
        return [
            [['image'],'file','extensions' => 'png, jpg'],
            [['file'],'file','extensions' => 'txt,doc,pdf'],
        ];
    }

public function upload() {
        if($this->validate()) {
            $path = 'upload/store/'.$this->image->baseName.'.'.$this->image->extension;
            $this->image->saveAs($path);
            $this->attachImage($path, true);
            @unlink($path);
            return true;
        }
        else { return false; }
    }

Question: I open the information update page, in my case these are books, I add all the information and a picture. Everything is saved and loaded normally. The same situation is with the file (these are text files such as txt, pdf ...). But when I select both downloads at once, and not separately. I get this error:

finfo_file(D:\OpenServer\userdata\temp\phpCD25.tmp): failed to open stream: No such file or directory

Tell me what and where to add to me, how to fix it? Thank you in advance))