Hello,

Your given login details are not working.

So, please once make sure that you have defined the Global Additional Tabs under the Dashboard > Theme Settings > Single Product > Tabs > Additional tabs > there you can find the Tabs to defined: https://snipboard.io/Xsfj54.jpg

Then clear the cache on your site and check the issue. If the issue remains, share the wp logins details of your site i will check and give you a possible solution.

Best Regards.