bad sort specification in ../vendor/mongodb/mongodb/src/Operation/Find.php

[ludo1960]

I am struggling to resolve an issue, trying to install laravel-admin, all seem well with the install, but when I try to browse the site I get the following error /var/www/slimmongo.local.com/vendor/mongodb/mongodb/src/Operation/Find.php /** * Execute the operation. * * @see Executable::execute() * @param Server $server * @return Cursor * @throws UnsupportedException if collation or read concern is used and unsupported * @throws DriverRuntimeException for other driver errors (e.g. connection errors) */ public function execute(Server $server) { if (isset($this->options['collation']) && ! \MongoDB\server_supports_feature($server, self::$wireVersionForCollation)) { throw UnsupportedException::collationNotSupported(); }

    if (isset($this->options['readConcern']) && ! \MongoDB\server_supports_feature($server, self::$wireVersionForReadConcern)) {
        throw UnsupportedException::readConcernNotSupported();
    }

    $cursor = $server->executeQuery($this->databaseName . '.' . $this->collectionName, new Query($this->filter, $this->createQueryOptions()), $this->createExecuteOptions());

    if (isset($this->options['typeMap'])) {
        $cursor->setTypeMap($this->options['typeMap']);
    }

    return $cursor;
}

public function getCommandDocument(Server $server)
{
    return $this->createCommandDocument();
}

/**
 * Construct a command document for Find
 */
private function createCommandDocument()
{
    $cmd = ['find' => $this->collectionName, 'filter' => (object) $this->filter];

Arguments "bad sort specification (View: /var/www/slimmongo.local.com/vendor/encore/laravel-admin/resources/views/partials/sidebar.blade.php) (View: /var/www/slimmongo.local.com/vendor/encore/laravel-admin/resources/views/partials/sidebar.blade.php) (View: /var/www/slimmongo.local.com/vendor/encore/laravel-admin/resources/views/partials/sidebar.blade.php) `

The contents of the partial are:

`

<!-- sidebar: style can be found in sidebar.less -->
<section class="sidebar">

    <!-- Sidebar user panel (optional) -->
    <div class="user-panel">
        <div class="pull-left image">
            <img src="{{ Admin::user()->avatar }}" class="img-circle" alt="User Image">
        </div>
        <div class="pull-left info">
            <p>{{ Admin::user()->name }}</p>
            <!-- Status -->
            <a href="#"><i class="fa fa-circle text-success"></i> {{ trans('admin.online') }}</a>
        </div>
    </div>
    <!-- Sidebar Menu -->
    <ul class="sidebar-menu">
        <li class="header">{{ trans('admin.menu') }}</li>

        @each('admin::partials.menu', Admin::menu(), 'item')

    </ul>
    <!-- /.sidebar-menu -->
</section>
<!-- /.sidebar -->

`

Can anybody suggest where to start digging?