Dear sir,
1. 500 error: Please contact to your hosting provider to check this issue, eventhought I can not access your admin account to check this issue.
2. Footer: Please add this code in bottom of file: wp-content/themes/furnicom/css/app-default.css
.footer {
background-size: auto 100%;
position: relative;
}
3. My account: I see it has dropdown, but it has only menu, you need add more in admin site: Appearance-> Menu
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4. Social: It only show in product details pages:
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5. You can add other social in files:
wp-content\themes\furnicom\lib\defines.php
wp-content\themes\furnicom\lib\utils.php
Thanks.