ErrorException Array to string conversion-Laravel 8

Question

Am trying to upload files on my laravel project but getting an error 'ErrorException Array to string conversion'

Any help will be much appreciated. Below is the error

ErrorException Array to string conversion

C:\xampp\htdocs\laravel\filesUpload\vendor\laravel\framework\src\Illuminate\Support\Str.php:609

    /**
     * Replace a given value in the string sequentially with an array.
     *
     * @param  string  $search
     * @param  array<int|string, string>  $replace
     * @param  string  $subject
     * @return string
     */

    public static function replaceArray($search, array $replace, $subject) 
    {
        $segments = explode($search, $subject);
        $result = array_shift($segments);

        foreach ($segments as $segment) {
            $result .= (array_shift($replace) ?? $search).$segment; //line 609
        }
 
        return $result;
    }