Internal Server Error

array_merge(): Argument #2 is not an array

[cms/framework/f3/base.php:2261] Base->error()
[plugins/frontpage/base.php:148] array_merge()
[cms/framework/pagetypes/plugin.php:45] Plugins\Frontpage\Base->show()
[cms/models/pages.php:229] PageTypes\Plugin::render()
[cms/controllers/frontend.php:59] Models\Pages->render()
[cms/framework/f3/base.php:1873] Controllers\Frontend->index()
[cms/framework/f3/base.php:1673] Base->call()
[cms/app.php:24] Base->run()
[index.php:16] App->run()

DB LOG