add button is missing for Content:Toolbar - 2sxc

Question

The add button that appears over the 2sxc items is missing all of a sudden. It was there a couple days agao but now when I log into any portal in my DNN instance the "+" or add button is missing
here is a screen shot:
As you can see, the change layout and edit buttons are there. Not sure why the add button disappeared.
This is true for apps that I import from the 2sxc.org website as well. So I know its not just my template becasue it also happens on all the apps I have created which use different templates.
But to be thorough, here is my template code, its token based:
<div class="kr-gallery animation">
<p>Hover or touch image and click brush icon for more details</p>
<div class="isotope_grid isotope_grid2">
<div class="isotope_main animation" data-min-width="230">
<repeat repeat="Content in Data:Default">
<div class="isotope_item kr-gallery-item sc-element">[Content:Toolbar]
<div class="photo"><a href="[Tab:FullUrl]/details/[Content:EntityId]"> <img alt="" src="[Content:Image]?h=500" />
<span class="fa fa-paint-brush"></span></a>
</div>
</div>
</repeat>
</div>
</div>
</div>
Any idea why this is?
UPDATE:
Here is my visual query:
SOLUTION:
Based on answer, I switched to razor because I am using a custom query. Here is my simple template code now:
#* this will show an "add" button if the current user is an editor *#
#Edit.Toolbar(actions: "new", contentType: "Image")
#{
// get all images as delived from the standard query
var images = AsDynamic(Data["Default"]);
}
<div class="kr-gallery animation">
<p>Hover or touch image and click brush icon for more details</p>
<div class="isotope_grid isotope_grid2">
<div class="isotope_main animation" data-min-width="230">
#foreach(var img in images)
{
<div class="isotope_item kr-gallery-item sc-element">#img.Toolbar
<div class="photo"><a href="#Link.To(parameters: "details=" + img.EntityId)"> <img alt="#img.Title" src="#img.Image?h=500" />
<span class="fa fa-paint-brush"></span></a>
</div>
</div>
}
</div>
</div>
</div>

Answer 1

The missing + is by design, because editors are used to the + adding an item right after the previous one. This behavior cannot be guaranteed with a query, as the order of things is determined by the query. It is even possible, that adding an item will not show up, if a query-parameter hides that item.
So the design pattern is to provide a separate + button. The easiest way is in razor, I believe the code is something like
#Edit.Toolbar(actions: "new", contentType: "your-content-type-name")
In Tokens it's a bit more messy, and you cannot conditionally check if a user has edit-permissions.
So I recommend you go the edit.toolbar way
You can also find an example of this in the blog app: http://2sxc.org/en/apps/app/dnn-blog-app-for-dnn-dotnetnuke

Answer 2

I could be wrong but did you recently experiment with the visual query designer? Because this could be the cause.
The most common reason is when you use a pipeline (visual query) to deliver data to a template, which is not assigned to this instance. Reason is that "add" in a instance-list of items add it to a specific position (like right after the first one). This isn't the same when you use data like a data base - as there is no sorting in that scenario. So if this is the cause, I'll help you more.