Newsletters causing a conflict with the date picker in another plugin

Hi there

I have another plugin that uses a datepicker, that is simply built using the following JS

$('#my_div').datepicker({
multidate: true,
format: "dd-mm-yyyy",
startView: 1
});

When I activate Newsletters, this date picker doesn't render correctly and doesn't work. When I disable Newsletters, the datapicker works again.

I don't seem to be able to add screenshots to this post for some reason, but let me know if I can send those to you another way?

Many thanks,

Matt