Zotero sync not working

Questions
,
1

I just subscribed to premium, and I’m trying to get Zotero sync to work. I’m in Firefox, and I’ve connected my Zotero account. When I click the button to Sync from Zotero, it churns for a while, then pops up an error message (I haven’t been quick enough to see what the error message says). There is an error in the browser console (below) that seems to happen at about the same time.

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://api.typst.app/v1/graphql. (Reason: CORS header ‘Access-Control-Allow-Origin’ missing). Status code: 504.
2

On refresh, the zotero.bib file has been created, but it’s basically empty, with only the following contents:

@misc{noauthor_notitle_nodate,
	keywords = {research ideas},
}

@misc{noauthor_notitle_nodate-1,
	keywords = {research ideas},
}

@misc{noauthor_notitle_nodate-2,
	keywords = {research ideas},
}