Hi,

To solve this issue, please go to the file app\design\frontend\base\default\layout\sales.xml, find and replace the code below

<reference name="footer_links">
    <block type="sales/guest_links" name="return_link"/>
    <action method="addLinkBlock"><blockName>return_link</blockName></action>
</reference>

By:

<!-- <reference name="footer_links">
    <block type="sales/guest_links" name="return_link"/>
    <action method="addLinkBlock"><blockName>return_link</blockName></action>
</reference> -->

Thanks,