Archives Breaking Theme

I am trying to edit my footer.php so that I can limit the amount of months shown in the “Archives by Month” column. Please see: https://eyesoncreativity.com/ (at the bottom).

I tried editing the code in the footer.php:

<div id="footerleft">
	<h2>Recent Updates</h2>
		<ul><?php get_archives('postbypost', 10); ?></ul>
	</div>

<div id="footermiddle1">
	<h2>Archives by Month</h2>
		<ul><?php wp_get_archives('type=monthly', 10); ?></ul>

You’ll notice I tried adding the , 10 – but that did not work (and obviously neither did omitting it). Any ideas?