[PS4] Premium, DLC I bought can't be played anymore

So, I've bought Premium a while ago, and every DLC worked fine.

I played through some games on Metro, Firestorm, some Dragons Teeth maps...

I also unlocked some Assignments, some of which are related to DLC content, namely the UNICA-6.

But recently for seemingly no reason it always says "You have to purchase this DLC to join the server" (or something similar).

This happens in all DLC's!

Before this happened I was able to join servers running Operation Metro, Pearl Market, etc, now I can't access those anymore.

For the record, this happened after the PS4 DDOS attack and PSN maintenance, but other than that, there was no Battlefield patch inbetween.

Stuff that may or may not help:

- Originally, I got all the DLC's through the Store in the ingame menus

- The PS4 says "the DLC is already installed" if I try to reinstall it.

- I already tried restoring the licenses on my PS4 (5+ times :P).

- I restarted my PS4 completely (3 times)

- I can't change my "active soldier" on Battlelog as I only have one.

- My Battlelog shows that I have unlocked the UNICA-6 and it also shows multiple assignments which I've unlocked before, but ingame on PS4, all content I got from DLC-Assignments and the DLC's themselves are not unlocked.

- If it is relevant, I have the german version of the game.

Yeah, that's the solution, if all of the steps above that I tried don't work for you, you may have to delete your BF4 game data in the system storage.

What this means:

1. Unless you back up your save data in the cloud, it will automatically delete it.

   > Single Player Campaign and Options will be reset

      > Multiplayer Progress will be unaffected

!!! Better restore licenses after deleting your game data, just to be sure !!!

2. Now you'll need to install Battlefield 4 again, then Update it and reinstall Premium. Test if Premium works immediately after downloading it!

   >  If it works, there should be PREMIUM in golden letters just below BATTLEFIELD 4 in the upper-left corner in the main menus

3. Reinstall the other DLC if it worked, then the issue should be fixed.

I marked ragnarok013's post as Solution since it's pretty much what I explained here, although it's likely something else was corrupted.