I noticed that this thread is a couple of years old, but I'll still try to help you out with your webchat theme issue. It's never too late to find a solution!
From the information you provided, it seems that the problem lies with the missing "::marker" inside the "<li>" tags. One possible solution is to check if the WordPress theme you were using at that time has been updated. Theme updates often include bug fixes and improvements that might have resolved the issue you were facing. You can visit Freetheme to explore their collection of themes and see if any updates or alternatives are available.
If you're still experiencing the same issue, you can consider reaching out to the theme developer or the WordPress community for assistance. They may have encountered similar problems in the past and can provide valuable guidance.

Thank you for the quick response. We will test that and let you know how it goes.