Hi,
Try v2.41 and see if this change described in the changelog works in your setup:
Added option to override the location of the configuration list for the bookable time range. To use this, add a variable like this to the CEWP where you refer this solution:
<script type="text/javascript">
var rm_configListBaseUrl = "/The_Base_Url_Of_The_Site";
</script>
Alexander