DLL works in editor, but gives an exception in Android

I have a project for which I had to create a C++ DLL. Everything works fine in the editor (with Android settings and all), but when I try it on my phone it doesn't work.

It doesn't crash, at first I didn't even notice that it didn't work, I thought that the results are just not updated.

After I put the wrapper function in a try/catch block I got an exception with the name of the DLL, nothing else.

I put the DLL in Plugins under Assets and I figured that I don't have to do anything else since everything works fine on the computer in the editor. What did I miss?