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dstillman
Zotero Team
This discussion was created from comments split from: Zotero Add Citation stuck on progress bar.
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Restart Zotero and try again, and if you're still having trouble, check to make sure that the dialog isn't just appearing behind the main Zotero window.
If you can't figure it out, restart Zotero and provide a Debug ID for an attempt that fails.
You should also try disabling third-party plugins.