I'm not sure, and hoping it was an error and nothing related with copyrights or whatever. The Spotify link on Don Diablo's page is pointing to a missing podcast, definetely, so seems it's not anything related to us users.
Just popping in to confirm that the availability of content on Spotify is determined by who owns the rights to such content: for example, the original content creator, the artist promoting it (which might coincide with the original content creator), or their management.
For instance, some content is or becomes only available in certain countries, while access is blocked to others depending on these rights-related dynamics.
Sometimes, it might also happen that the content will be unavailable temporarily, and come back again later.
It's worth considering that we add new content to Spotify every day, so if you can’t find something you’re looking for right now, it may appear (or reappear) soon.
Hope you'll find this info useful. Let us know if we can help with anything else!
Help others find this answer and click "Accept as Solution".
If you appreciate an answer, maybe give it a Like.