Readwise plugin problem: "Sync in progress initiated by different client

Hi – I’ve been loving the official Readwise plugin, but suddenly it’s not working. When I “initiate sync,” I get the message, “Sync in progress initiated by different client.” I tried the usual basic-user techniques of uninstalling & reinstalling the plugin; no luck.

This began happening after I started moving my graph from my home computer to my work computer and back again, manually. (I know that’s crazy, but … there’s no way for me to sync my graph between devices, given how IT has locked down my work computer.)

I saw one person on reddit with the same problem; anyone else? Ideas?