error while changing the public preview status.

We are using this plugin the plugin does the job, but we have a cache plugin installed and enabled on the website. Due to the cache, we couldn’t see the changes in the preview link. Also when we disable the preview link it throws an error like below.

error while changing the public preview status.

@ocean90 Does this plugin stopped working or stopped giving support?

The page I need help with: [log in to see the link]