Just an update. I started to create a testing site on my local computer, but didn't get very far because, unfortunately, I don't have the time or expertise. We do not have a dedicated IT person to help us right now. I emailed woocommerce to see if they could help, but I'm still not sure if it's an issue with the theme or something else. I just don't want to change the theme on the live site to troubleshoot, but maybe that's my only option?
If it's not the theme that is causing the problem, what else might be the problem? @gabrielcastillo, what do you mean when you say that it might be the "installation of wordpress" that is causing issues?
Thanks again. I appreciate the help.