Grey vertical stripe
I am an H5P and Wordpress newbie. There appears a small grey vertical stripe when I use H5P. Not sure if it's some sort of incompatibility between plugins as I'm using the Elementor plugin to build the pages, hopefully you can give me some advice. The details are the following:
1. I am using the plugin Elementor version 1.7.12. I insert the generated h5p code with Elementor in a text box.
2. The Wordpress version is 4.8.3.
3. Desktop (Mac OS X)
4. Firefox 56.0.2
5. H5P version 1.9.4
Attached is the screenshot of the grey stripe. Many thanks in advance,Ana.