Using imagescarl throws error

[LuposX]

I downloaded imagescalr and added it to the project.
When trying to rezise a image with Scalr.resize(this.chessImg, Scalr.Method.SPEED, Scalr.Mode.FIT_TO_WIDTH,

I get the following error:

Exception in thread "main" java.lang.NoClassDefFoundError: org/imgscalr/Scalr$Method
	at main.ChessField.<init>(ChessField.java:26)
	at main.GameRenderAWT.<init>(GameRenderAWT.java:29)
	at main.Main.<init>(Main.java:21)
	at main.Main.main(Main.java:17)
Caused by: java.lang.ClassNotFoundException: org.imgscalr.Scalr$Method
	at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:602)
	at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
	... 4 more

I am sure that I have added th jar ro the project so i dont know why classes would be missing.

[cartesian-plane]

@LuposX
Hello, I have a question about the Chess game you made.

(I couldn't find any contact info so I am contacting you here)
How did you handle the scaling of the chesspiece icons, as I myself have tried multiple approaches but none were good enough (batik, imgscalr, svgsalamander). The icons are always a bit blurry even if I downscale from a 4k PNG.
Reading SVG's also seems to be a pain in Java.
If you could point me in the right direction, I'd really appreciate it!