505 Unspecified error

[emmjam]

Hello

There was an error retrieving: https://<server>/nextcloud/index.php/apps/notes/api/v0.2/notes
Error: 505 Unspecified

I only see this error pop-up message when I log out and log back in to the client. No notes ever appear in the client. Nothing appears in any of the logs on the server side (apache/nextcloud). I can navigate to the Notes folder in the web browser and everything is there. This did work when I first reinstalled the server a few days ago (hence there are existing notes). I did have a permission issue, which has now been resolved. Other than that I cant think of any changes relevant to this. Any idea what else I can investigate for this ? Are there any client side logs ?

Thanks