nulldevice, the problem on my end was apparently with the syntax of another javascript. the ‘src’ was a relative url, and was changed to an absolute url.
my specific error was originally this:
<script type="text/javascript" src="/bin/osmplayer.compressed.js"></script>
<link rel="stylesheet" href="/templates/default/css/osmplayer_default.css">
<script type="text/javascript" src="/templates/default/osmplayer.default.js"></script>
and was changed to this:
<script type="text/javascript" src="https://www.site.com/bin/osmplayer.compressed.js"></script>
<link rel="stylesheet" href="https://www.site.com/templates/default/css/osmplayer_default.css">
<script type="text/javascript" src="https://www.site.com/templates/default/osmplayer.default.js"></script>
Javier, this plugin’s author changed it for me, even though it had nothing to do with his plugin. He’s awesome!