Currently, I am using Papership to read and make note on papers collected and managed by Zotero. All paper files from Zotero are hosted by a Webdev service on a NAS back home. But there’s a sync failure regularly going on of my Papership app, while all Zotero across different devices syncs without any problem. Only the edition made by Papership cannot sync with other devices. I have no idea why this issue happens all the time.

But there’s one way to fix it:

Just create an empty text file called lastsync.txt inside the zotero root folder that is hosted by webdev service.

It will sync again on Papership.