BUG: Power BI Report Server Oct 2020 using folders as a data source

If i create a new report that has a folder as a data source, if i then try to upload that file to the oct 2020 power bi report server it complains that the the report was created with a newer version than the server. The versions oct 2020 desktop optimized matches the server. Other uploads do not fail with this message.

May 2020 uploade