After building, final jar not working?

[FinnT730]

So, I have build the .dll (.so for Linux), and moved it to the right folder and everything

Somehow, I am getting this error. I went and created this folder, moved the .dll / .so in it, and renamed it to see if the file name had anything todo with it.
Am I doing something wrong? Since building the c++ files worked without error, so I think there is no error in that?
I am using this release: link
If you want me to create a github repo to reproduce it, let me know, since I might have a feeling I might be doing something wrong XD

Thanks in advance!

[FinnT730]

After I showed someone else this issue, they found out that I was doing something wrong.
I forgot to add the .dll / .so file to the .jar file in the end.
WHOOPS.