My Question or Issue

I have my local files working perfectly on my laptop and in the past, I have had these local files songs easily transfer from my laptop to iPhone, at the most, it would take half an hour to get to my phone but always worked in the end and would show up in whatever playlist I would put the songs into. 

But just the other day my Spotify app was crashing, so I figured to just uninstall the app then reinstall it, which obviously deleted ALL of my downloaded songs. After downloading all of the songs that are already on Spotify, I did see my local file songs were no longer playable, just appearing grey and unable to tap on, and after doing what I've done in the past to transfer songs from my laptop to phone, it wasn't working like it always would. I've tried everything, both devices are on the same wifi, and both are fully updated on the latest version.

I even tried un-adding some of the local files and re-adding them to different playlists, changing the location of where some of them are stored in my laptop, even trying newly downloaded songs to add to local files that weren't previously on my Spotify. But although the new stuff appears on my phone, and is playable on my laptop, it still isn't playable on my phone. I keep resetting both the desktop and app versions to see if it'll work and I've checked and rechecked everything in both the versions settings and everything is the exact same as it used to be. I'm not sure what could be different as this used to easily transfer from laptop to my phone and nothing is different but I see no reason as to why it won't let me listen to them on my phone anymore.