The system account was not connected for offline access error when connecting Dropbox OAuth 2 Moodle

Hi Pixel Clear,

One thing is certain - your issue is not directly related to Dropbox API, since the error is not coming from Dropbox API. Contact your middle stage environment provider for further info and if needed that provider will contact Dropbox with additional details.

Good luck.

Hi Здравко,

Thanks for the quick reply. I asked from Namecheap that hosts my server and they said they are not blocking anything coming from Dropbox. 

I used HTTP protocols. I added the API key ID and secret and also below links I got from Dropbox documentation and applied them to Moodle settings

service base url
https://api.dropboxapi.com

authorization_endpoint
https://www.dropbox.com/oauth2/authorize

token_endpoint
https://api.dropboxapi.com/oauth2/token

userinfo_endpoint
https://api.dropboxapi.com/2/openid/userinfo

Please let me know if these API endpoints are correct

Thanks.

API endpoints are correct, but it's another story what are you doing with them! Maybe something is wrong with what you do. I though that what you showed comes from other provider and my previous advice was in this context, but since you're doing all calls, clarify what exactly are you doing.

Take a look here, as an example, and see what are differences with what you do.

Hope this gives direction.

As Здравко said, this error message does not come from Dropbox itself. This sounds like something the Moodle software should configure, so I suggest reaching out to the makers of Moodle for help.