Strange Error: java.lang.UnsatisfiedLinkError: 'long jni.rpi_ws281xJNI.new_ws2811_t()'

[NikeJV]

Hi
When I run a jar file on a Raspberry Pi 4 Model B, I get the following error:

14:09:12.977 [main] INFO ws281x.Ws281xLedStrip - LEDs count: 100, GPIO pin: 12, freq hZ: 800000, DMA: 10, brightness: 255, pwm channel: 0, invert: false, strip type: WS2811_STRIP_RGB, clear on exit: false
14:09:13.015 [main] INFO ws281x.Ws281xLedStrip - Native library loaded
Exception in thread "main" java.lang.UnsatisfiedLinkError: 'long jni.rpi_ws281xJNI.new_ws2811_t()'
at jni.rpi_ws281xJNI.new_ws2811_t(Native Method)
at jni.ws2811_t.(ws2811_t.java:90)
at ws281x.Ws281xLedStrip.init(Ws281xLedStrip.java:201)
at ws281x.Ws281xLedStrip.(Ws281xLedStrip.java:99)
at ws281x.Ws281xLedStrip.(Ws281xLedStrip.java:56)
at MainKt.main(main.kt:4)

Any idea what is going wrong?