Tree Problem

Hi,

I have 2 problems:

1. I tried to use <span style=”color: #3a3a3a; font-family: ‘Source Sans Pro’; font-size: 15px;”>[wpdm_tree] shortcode in this page as first one </span><span style=”color: #3a3a3a; font-family: ‘Source Sans Pro’;”><span style=”font-size: 15px; line-height: 22.5px;”>http://sitogruppoprova.altervista.org/pagina-pubblica/ but i get this error
   <b>Fatal error</b>: Call to undefined function wpdm_user_has_access() in <b>/membri/sitogruppoprova/wp-content/plugins/wpdm-extended-shortcodes/wpdm-extended-shortcodes.php</b> on line <b>415
   </b>Why this? 🙁

   </span></span>

2. If I go to http://sitogruppoprova.altervista.org/wp-admin/edit.php?post_type=wpdmpro&page=wpdm-addons (Add-Ons section of my site) I get this errors
   <div class=”wrap w3eden” style=”outline: 0px; margin: 0px; padding: 0px; color: #444444; font-family: ‘Open Sans’, sans-serif; font-size: 13px; line-height: 18.2px; overflow-x: hidden; background-color: #f1f1f1;”>
   <div class=”container-fluid” style=”outline: 0px; box-sizing: border-box; padding-right: 15px; padding-left: 15px; margin-right: auto; margin-left: auto;”>
   <div id=”addonlist” class=”row” style=”outline: 0px; box-sizing: border-box; margin: -15px -15px 10px;”>
   <div class=”col-md-12″ style=”outline: 0px; box-sizing: border-box; position: relative; min-height: 1px; padding: 0px 15px; float: left; width: 1188px; margin: 0px;”>
   <div class=”panel panel-default” style=”outline: 0px; box-sizing: border-box; margin-bottom: 20px; border: 0px; border-radius: 0px; box-shadow: none; background-color: #ffffff;”>
   <div class=”panel-heading” style=”outline: 0px; box-sizing: border-box; padding: 10px 15px; border-bottom-width: 1px; border-bottom-style: solid; border-color: #dddddd; border-top-left-radius: 3px; border-top-right-radius: 3px; font-weight: bold; color: #333333; background-image: linear-gradient(#f5f5f5 0px, #e1e1e1 100%); background-color: #f5f5f5; background-repeat: repeat-x;”>
   <h3 style=”font-weight: 500; color: inherit; font-size: 24px; margin: 20px 0px 10px; box-sizing: border-box; font-family: inherit; line-height: 1.1;”>WPDM Add-Ons</h3>
   </div>
   <div class=”panel-body” style=”outline: 0px; box-sizing: border-box; padding: 15px;”>
   <ul class=”nav nav-pills” style=”padding: 0px; list-style: none; box-sizing: border-box; margin-top: 0px; margin-bottom: 0px;”>
   <ul class=”nav nav-pills” style=”padding: 0px; list-style: none; box-sizing: border-box; margin-top: 0px; margin-bottom: 0px;”>
   <li class=”active” style=”margin-bottom: 6px; box-sizing: border-box; position: relative; display: block; float: left;”>All Add-Ons

<br style=”box-sizing: border-box;” /><span style=”font-weight: bold; box-sizing: border-box;”>Warning</span>
<ul class=”nav nav-pills” style=”padding: 0px; list-style: none; box-sizing: border-box; margin-top: 0px; margin-bottom: 0px;”>
<ul class=”nav nav-pills” style=”padding: 0px; list-style: none; box-sizing: border-box; margin-top: 0px; margin-bottom: 0px;”>: Invalid argument supplied for foreach() in

<span style=”font-weight: bold; box-sizing: border-box;”>/membri/sitogruppoprova/wp-content/plugins/download-manager/tpls/wpdm-addons-list.php</span>
<ul class=”nav nav-pills” style=”padding: 0px; list-style: none; box-sizing: border-box; margin-top: 0px; margin-bottom: 0px;”>
<ul class=”nav nav-pills” style=”padding: 0px; list-style: none; box-sizing: border-box; margin-top: 0px; margin-bottom: 0px;”> on line

<span style=”font-weight: bold; box-sizing: border-box;”>201</span></div>
</div>
</div>
<div style=”outline: 0px; box-sizing: border-box; padding: 0px 20px;”><br style=”box-sizing: border-box;” /><span style=”font-weight: bold; box-sizing: border-box;”>Warning</span>: Invalid argument supplied for foreach() in <span style=”font-weight: bold; box-sizing: border-box;”>/membri/sitogruppoprova/wp-content/plugins/download-manager/tpls/wpdm-addons-list.php</span> on line <span style=”font-weight: bold; box-sizing: border-box;”>205</span></div>
</div>
</div>
</div>

Could you please help me?

Thank you very much! 🙂