Zotero 6 InfiniCloud WebDAV同步附件时的证书报错问题

写在最前面，Zotero 7正式版已经发布，可以直接更新Zotero 7解决。如果因为各种原因不想升级Zotero，再看以下步骤。

此外，我把关键步骤信息都加粗了，如果有问题，可以着重查看加粗部分，基本可以解决99%问题。

一直使用TeraCloud（现更名为InfiniCloud）作为WebDAV网盘同步Zotero的文献附件资料。前几天同步时候突然报错：

toi.teracloud.jp uses an invalid security certificate.

The certificate is not trusted because the issuer certificate is unknown.
The server might not be sending the appropriate intermediate certificates.
An additional root certificate may need to be imported.

Error code: SEC_ERROR_UNKNOWN_ISSUER

我先是和InfiniCloud客服询问相关信息，获得的答复是Zotero的故障，相关回复如下。后在Zotero论坛发现了实际原因和解决方案，亲测有效。

InfiniCloud官方支援回复邮件节选

Unfortunately, this appears to be an issue from Zotero’s side, not InfiniCLOUD.
This problem has been acknowledged and hopefully will be resolved in