Can't sync Local Files

[tomchook]

Hello,

I'm using Spotify on my MacBook Pro early 2015 MacOS 1.1.56.595.g2d2da0de and on my iPhone 12 Pro iOS 14.4.2 using Spotify 8.6.18

I followed carefully Katerina's instructions here, but nothing seems to work. I tried reinstalling both apps (mac or iOS),  unticking "Hide Unplayable Songs", move the mp3s to another folder and adding the source again, and using the iPhone's hotspot for the internet connection, but it doesn't work. 

The devices recognize each other, so I can play a song on my MacBook Pro and listen to it on my iPhone and vice versa. 

What else can be done?

[AeroZ]

Did you enable local files option in iPhone?