Dear @liuhongxin1993,
Thank you for your reply.
We have tested the plugin with your mentioned versions and noticed that there are no problems found on our end.
Please provide us with the following information for further investigation of your case.
1. Please clarify what problem exactly you are facing by providing us with screenshots.
2. Besides this, please provide us with the?error.log?file?of that site accordingly.?
If you don’t know how to find this?file, please get in touch with your?Hosting Provider?so they can send it to you.?
3. The link, where the copy protection is enabled.?
By the way, please feel free to open a new topic each time you have new questions so that the information can be accessible to other users as well.
Thank you.