SeaDoc Integration 403 Error - Invalid Signature?

[Kieranwest]

Hi All,
Running SeaFile and SeaDoc as two seperate docker containers on unRAID. I've followed the documentation and updated all the corresponding .py files but it seems I keep running into the same problem. When I try to create and open a SeaDoc file I get the 'Load doc content error' and Chrome console reports /sdoc-server/api having a 403 error. When I navigate just to /sdoc-server I see 'Welcome to sdoc-server. The current version is 0.7.0' so I assume all my Nginx configuration is correct?

I've also checked the logs on SeaDoc under /sdoc-server/logs/sdoc-server.log and it reports

[INFO] document-manager.js[104] - 0 docs saved.
[ERROR] auth.js[25] - invalid signature

Any idea what this could be?