There are many threads like this one, and all end up the same way: no clue.
Why is my spotify desktop client claiming I am offline, while I am fully online?
It might be a facebook password issue for someone: not me.
It might be solved with a clean reinstall: not for me.
I am on a mac, couldn't even reach your website -> i get this on Safari:
404 Not Found 188.8.131.52 - no redirects at this IP
I had to download the desktop app from the phone and then move it to the mac to reinstall. I guess it may be some problems with hosts file or anyway something dealing with routing settings? Have you checked there yet?
My premium account works perfectly on the (android) phone, and this is the only reason I am not cutting the subscriptions. But it is really UNBELIEVABLE that this issue has been around since YEARS and you did not care about it enough yet, to have it fixed.
All I did was download an older version of Spotify from a trusted source called XDA Developers. They have a 'Stable' and 'Beta' version, I am using the 'Beta' version. In order to install the app, you need to allow installing from "unknown sources." Go to Settings > Security > 'Unknown Sources' > Allow/etc. If you have trouble, please go here. <--
I also have this issue. I have an unlimited data plan (not the US "unlimited" but really unlimited) so I'm nearly always on 4G and it doesn't matter how much I use. Since I have all of my music already downloaded this wasnt really an issue for me but I tried to search for a new album today and it gave me the same "no offline results" message. It's really annoying and I already tried to force stop, clear cache and clear data and restarting my phone but it all didn't work. Can someone help me🙏
Edit: It's also not linked to Facebook so that isn't the problem either and I do have the download over mobile option turned on