It is most likely your theme (or another plugin) causing interference. See other posted questions and answers in the forum about similar issues. They have all discovered it is their theme. I checked your site and it is not using the latest SLP version 4.7.2
I cannot debug or test a test site. I see a lot of syntax and reference errors, so its useless for me to try and debug a testing url. You can use the WP debugger to find where the conflict is and send the debug log to us if you need help with it. If you need Lance to login and troubleshoot you will need to use the Paid support option.