files api does not work

[Cross-linking for reference: https://stackoverflow.com/questions/78419300/get-dropbox-folders-data ]

Based on your answer on StackOverflow, it sounds like you've already sorted this out. To confirm, scope changes on an app do not retroactively apply to existing access tokens.

Calling listFolder does require the "files.metadata.read" scope. If you attempt a call like that using an access token without the relevant scope granted though, you should get an exception raised, so you may want to check on how you're handling exceptions in your app to make sure you can see exceptions like that.