_sidebar.php

<?php Block::put('breadcrumb') ?>
    <?= $this->makeLayoutPartial('breadcrumb') ?>
<?php Block::endPut() ?>

<?php if (!$this->fatalError): ?>
    <?php Block::put('form-contents') ?>
        <div class="layout">
            <div class="layout-row">
                <?= $this->formRenderOutsideFields() ?>
                <?= $this->formRenderPrimaryTabs() ?>
            </div>
        </div>
    <?php Block::endPut() ?>

    <?php Block::put('form-sidebar') ?>
        <div class="hide-tabs"><?= $this->formRenderSecondaryTabs() ?></div>
    <?php Block::endPut() ?>

    <?php Block::put('body') ?>
        <?= Form::open(['class'=>'layout stretch']) ?>
            <?= $this->makeLayout('form-with-sidebar') ?>
        <?= Form::close() ?>
    <?php Block::endPut() ?>
<?php else: ?>
    <div class="control-breadcrumb">
        <?= Block::placeholder('breadcrumb') ?>
    </div>
    <div class="padded-container">
        <p class="flash-message static error"><?= e(trans($this->fatalError)) ?></p>
        <p><a href="<?= Backend::url($formConfig->defaultRedirect) ?>" class="btn btn-default"><?= e(trans('backend::lang.form.return_to_list')); ?></a></p>
    </div>
<?php endif ?>