Theme not compatible with simple widgets

Hello,

I like the theme and I donated some money hoping it helps the development.

Unfortunately at the moment I can’t use it because it is incompatible with some simple sidebar widgets I have on my page.

On my blog you can see how the “Latest tweets” widget is empty. There is also another widget right under the blog feed but it is not appearing. https://www.alfredo.motta.name

I think there is something wrong about how the html generated by the sidebar that is interfering with other widgets but I haven’t deeply investigated what it is.

Here you can see the sidebar widgets fully wording on twenty fifteen theme.
Working widgets

I have Version: 1.1.6 (I think is the latest)

let me know,
have a nice day