Recent posts widget broken

I’ve just added a new page on Elementor which will prominently feature a Recent Posts section. I only want this section to display a certain Category of posts. When I try to adjust this in the Content section of the widget, I’m able to adjust the Tutle, Number of posts to show, whether to show or hide posts, and the ‘if’ menu (Category, User, Author, Role etc.). The ‘is’ drop-down menu is not working – this is where I would select my ‘Blog’ Category. The ‘Or’ and ‘And’ section beneath this is all mashed up too and so it appears there’s an error with the widget.

I’ve tried both IE and Chrome, checked that I have the latest version of Elementor and have searched these forums and elsewhere on the internet to no avail.