Hello,

Please add this code to the Theme Settings > Custom CSS:

#1538838160849-fdad1ec3-78f6 .vc_tta-panel-body .wpb_content_element .wpb_wrapper ul li:before{
display:none
}
#1538838160849-fdad1ec3-78f6 .vc_tta-panel-body .wpb_content_element .wpb_wrapper ul{
list-style-type: circle;
}

I cannot log in to your site and check the code if it does not work deactivate all the blocking plugins and configurations.

Best Regards