Is your Facebook, Twitter, or Google +1 share buttons not displaying on your website?  Make sure you have copy/pasted the correct code each platform provides, into the appropriate sections in your admin panel.

Here are current working examples for the Scrapbooks app, for example (Any changes for the different software built-in apps would just be the ##scrapbookurl## part denoting the page link set dynamically - this placeholder text is provided in the Social Plugins section of each app Configure Site > Social Networking > configurations page, at the bottom of the page):

Facebook:

Code: Please login/register for access

Twitter:

Code: Please login/register for access

Google:

Code: Please login/register for access

Whatsapp:

Code: Please login/register for access

If you are using the Photo Uploads app, for example, in the instances where the share code has "##scrapbookurl##" you replace with "##puploadurl##" - which is provided in the Social Plugins section of the Photo Uploads app configurations page.