Our programmers checked CTL Arcade and it seems like they’ve updated their stuff 7 years ago. Which maybe why we’re getting this error, including the “can’t save score” error.
Author response
The plugin has been updated the last time on April 2022 as you can see from this screenshot: https://snipboard.io/YbyKkL.jpg If you have an issue with the plugin you can send us an email to support[at]codethislab[dot]com.