Bugs in content types

I'm trying to create the Chart content type on my Drupal 7 site (actually, just uploading your sample chart from Examples & downloads page), but it just returns a blank page upon save. Console shows several javascript errors. You can see for yourself at https://foxylearning.com/chart-test

I have found a bug with the content field of the Dates in the Timeline. When you click that field there are some buttons to create custom styling. If I click the link-icon the screen will have a white overlay but no link pop-up appears. There's also no way of exitting this state except refreshing the page (this same thing happened to me in the online demo mode on your site). I'm using Chrome (latest version) on a Mac (El Capitain 10.11.3).

Hope you can fix this, furthermore I love your product!

Kind regards,
Job

Hello,

I have a problem with the representation of the navigation bouttons in :

# .h5p-documentation-tool-footer .h5p-navigation-button-next::before {
    color: #ffffff;
    content: "";
    font-family: "H5PFontAwesome4";
    font-size: 24px;
    line-height: 28px;
    position: relative;
    right: -0.375em;