Assertion failed due to "Android Media Player" Plugin

I recently upgraded my project from 4.17 to 4.18 and I noticed that I can’t launch my project anymore.
This is the error message I get:

https://s18.postimg.org/vgme7ejex/err1.png

Immediately followed up with:

https://s18.postimg.org/fjnmabw21/err2.png

I assumed I needed to clean some caches or old data, so I tried deleting all binaries/intermediate folders in my project folder and in my project’s plugin folders. I also cleared my DerivedDataCache folder. It didn’t help.

The project doesnt crash at launch when I disable the “Android Media Player” plugin, though. So I assume that there is some sort of bug…
I forgot to mention: When I create a new project, everything works fine even with the “Android Media Player” plugin enabled.

Hello,

We’ve recently made a switch to a new bug reporting method using a more structured form. Please visit the link below for more details and report the issue using the new Bug Submission Form. Feel free to continue to use this thread for community discussion around the issue.

https://forums.unrealengine.com/unreal-engine/announcements-and-releases/1410408-unreal-engine-bug-submission-form

Thanks