Failed to load backend for fs.

报错信息:
[01/17/21 16:54:48] …/common/obj-store.c(1250): Failed to load json file: /home/zhaohj/Documents/seafile/seafile_storage_classes.json
[01/17/21 16:54:48] …/common/obj-store.c(114): [Object store] Failed to load backend for fs.
[01/17/21 16:54:48] seaf-server.c(1499): Failed to create seafile session.

这是我的json:
[

{

“storage_id”: “normal_storage”,

“name”: normal Storage",

“is_default”: false,

“fs”: {“backend”: “fs”, “dir”: “/home/xx/Documents/seafile/seafile-data”},

“commits”: {“backend”: “fs”, “dir”: “/home/xx/Documents/seafile/seafile-data”},

“blocks”: {“backend”: “fs”, “dir”: “/home/xx/Documents/seafile/seafile-data”}

}

{

“storage_id”: “Media_storage”,

“name”: “Media Storage”,

“is_default”: false,

“fs”: {“backend”: “fs”, “dir”: “/home/xx/Documents/seafile/seafile-data”},

“commits”: {“backend”: “fs”, “dir”: “/home/xx/Documents/seafile/seafile-data”},

“blocks”: {“backend”: “fs”, “dir”: “/home/xx/Documents/seafile/seafile-data”}

}
]