This seems like a problem with the project. I suggest you call technical support. Support information appears on the "Support" tab in the left rail when you sign in using an Admin account.

Is Desktop Web Viewer enabled in your app? To enable the Desktop Web Viewer, go to the On-Demand Portal, choose Apps, and click Create > Desktop Web Viewer.

DPS and Publish Online are two separate workflows. Publish Online is fully available to any InDesign user. In InDesign CC 2014, DPS is also available for limited previewing using the Content Viewer app. However, in order to create you own app, you need a DPS/AEM Mobile license. What are you trying to accomplish?Information about Publish Online: Use Publish Online to publish your InDesign documents Information about DPS: https://helpx.adobe.com/digital-publishing-suite/topics.html

Group the + sign with each small image before you turn them into buttons.

With DPS, anyone with an Adobe ID can create and preview folios. With AEM Mobile, an account is required to test articles. InDesign CC 2015 and later support only AEM Mobile. To create DPS folios, you need to use InDesign CC 2014, CC, or CS6.To sign up for an AEM Mobile trial account, go here: https://try.aemmobile.adobe.com/ Regarding the testing of InDesign-based .article files in AEM Mobile, create an article and add it to a collection. Whenever you make a change to the InDesign article that ...

I don't see a difference between your [Normal] state and your [Click] state. Are you using an invisible button that covers the button area? Here's what my button looks like. When I tap the button, it displays the MSO state and is hidden from view. Again, if using the click state to hide the button doesn't work in your layout, there are other approaches, such as nesting buttons within MSO states.

One option is to edit the button so that the [Click] state is invisible. That's the easiest approach. If that solution doesn't work, there are other approaches.