Why aren't the options in my dynamically inserted webform showing up? I've created a webform with one question that includes a list of checkboxes.

I made the webform available as a block, and am rendering the block in my template using:

&lt;?php
$block = module_invoke('webform', 'block_view', 'client-block-#####');
print render($block['content']);
?&gt;


However, when the form renders, I see the title of the question and the submit button, but the options are not visible. How can I debug why the checkbox options aren't showing up?
I checked admin/reports/dblog and it turns out the select_or_other plugin wasn't properly installed, stopping the options from showing up at all.