Your version of PHP is old and doesn’t support anonymous functions. The problem wouldn’t be there if you can update your PHP version which I would recommend. Otherwise, you can change the anonymous function that handles the shortcode.
Yeah that’s an issue. Its too thin and the page is bigger. I’m going to check the styles to see if there is anything I can do to fix the problem. Do you mind providing the URL?
I believe that you are having this issue because the page you are putting it in is too thin. That’s why there is an option for the rows instead of multiple columns. I don’t know but some people may think that it is thin when having only one author added since it doesn’t look like there are columns. Maybe I should make an exception when there is one added for it to use the whole width? If you want me to take a look at your specific situation I can do so with a link to the page.