So I used to (like 2018) be able to upload original content to my laptop, add it to a playlist and it would then play on my tablet - useful for live entertainment where the artist has their own tracks that need playing and you can use one device to play everything.
However, since upgrading early 2019 I have found that this option just creates greyed out, unplayable tracks on any device other than where the local file is. I originally read that both software versions needed to be the same (or newest) and everything needs to be on the same WiFi, etc which I have done, yet I still have the issue.
Does anyone have any idea on why this has happened and if there is a fix possible? It was such a useful feature that essentially sold Spotify to me as a work tool and without it makes the program just another app.