I have added som normal blocks for my theme, and it works well. Now I want to add some inline content blocks that I can place into other blocks. The documentation on this is not clear for me. 

Icon show up, but with a "!" and title tag saying "No location to drop in". I do understand from the documentation I should specify this, but how? If I change the starting div to a section, it works fine, but then it is not an inline widget, and can't be placed inside another block.

All code I have posted have been removed as it wasn't possible to read it. Please advise how I can post code in this forum.