Could you please make a version suitable for MultiPaper?
Generated images will not be displayed in sync across different servers...

I'm not familiar with MultiPaper. Could you provide more details on the setup you have? Do you have a shared directory will the images for all server instances?

Are you getting any exception thrown? Or any logs?

I have the folder data of the sync plug-in, and there is no error or exception on the console. I have temporarily switched to other plug-ins that support MySQL to achieve it. If you make one, please let me know, I will be very grateful.