My stack content is not showing on the page?

There could be many reasons for this, but the most likely reason is this. You have added a stack to your page that has changed the Page Filename.

Page Inspector Settings

Most users leave this setting alone, and depending on what RapidWeaver sees on your page, it will name this to either index.html or index.php. Most of the time it is index.html. Now, if you use certain stacks Tumblr, Global Content, or QuickPics Instagram ( just to name a few). These stacks will automatically change your filename from .html to .php as these stacks use PHP code and need to have a page filename of that type. The sad part about this change, is that when RapidWeaver uploads the new file, it does not delete the index.html file. Because of this, your server will still point to the index.html. To fix this, you just need to use an FTP program (like Transmit, Forklift, YummyFTP, etc) to log into your server and delete the appropriate index.html file. Please be sure you are finding the right folder where these files are, as you do not want to delete an index.html file if an index.php file is not also there, or your page will disappear.

Now go forth and make your websites great!