Zotero's PDF reader reports an error, but I don't know why
A bug report has been submitted, report ID991289160.
Error screenshot:
https://drive.google.com/file/d/1nXUvGZwqt3HogB5N2WkafyLuSFPxMoeR/view?usp=sharing
Error screenshot:
https://drive.google.com/file/d/1nXUvGZwqt3HogB5N2WkafyLuSFPxMoeR/view?usp=sharing
https://www.zotero.org/support/kb/data_directory_in_cloud_storage_folder