BibBase: Error retrieving bibtex file.
Request was:
http://https%3A%2F%2Fapi.zotero.org%2Fgroups%2F2503580%2Fitems%3Fkey%3Dt2fNBZxKJsjrlTOYPPQ4383E%26format%3Dbibtex%26limit%3D100 { 'User-Agent': 'bibbase', Connection: 'keep-alive', 'Keep-Alive': 'timeout=300, max=1000' }