I found how to solve the breaklines, here is how:

Update:

I found a way to fix the problem with the breaklines on the plugin.

Just go the plugins page, find the “Info Box on New Post Page Editor” and choose edit.

Find line:

echo stripslashes(strip_tags($this->options['InfoBox_Text'], '<br/> <b> <h1> <h2> <ul> <li> <ol>'));

And replace it with this one (Note that the only difference is the deletion of the “/” after the br:

echo stripslashes(strip_tags($this->options['InfoBox_Text'], '<br> <b> <h1> <h2> <ul> <li> <ol>'));

For me that solved the issue and now when I want to make a breakline I just use the “<br>” 🙂

Hope this helps someone!

Fernando

https://wordpress.org/plugins/info-box-on-new-postpage-editor/