Thanks gholemu and learningrl
I worked out what went wrong. As suggested, I went to ‘…Settings -> Media and make sure everything is right in there.’ and sure enough, I had changed the main url for this site from speakersprofessional.com to rosspage.me, but I had forgotten to change it in ‘settings>media’ – all done now and they load up fine. Muchas gracias senoras y senoritas! ??