I have never had an issue till just the other day and now my dropbox token expires every few hours and nothing I do seems to change that. Before I dont know that I did anything different. In rclone I just would go to authorize dropbox and it would authorize and I was good. Now every few hours I have to go back in and redo the whole process and create a new token.
I have tried generating one in the app itself but that token doesn't seem to work even with no expiry, when I paste it in. I still get a SL token and then a few hours later it has expired.
Now I have seen where others the token just keeps renewing. But either way I am lost Rclone says its a dropbox problem. I have the same app I have been using but just in case I created a new app and it works no different.