Hi,
did you touch this PHP file?
templates/YOUR_TEMPLATE/html/com_virtuemart/productdetails/default.php
Because this is not the original version. Please make sure what element you take out from the file, apparently you also eliminates the social media button elements. Put them back.
The lines to show the Social Media icons begins with:
<div class="FlexibleProductDetailShareWindow">
<div class="FlexibleProductDetailShareWindowLEFT width100">
<div class="FlexibleProductDetailShareWindowLEFTa width20">
<!-- AddThis Button BEGIN -->
...
...
...
[Look at the original PHP file that comes out from the Template ZIP file to get the rest of the lines]
...
...
...
Regards.
Support