Hello @NorSch,
Trying to look for your error on the web, I found the following thread that seems to refer to the same issue that you are running into : Getting UnsatisfiedLinkError: no jnilept in java.library.path when I create TessBaseAPI. Which talks about two issues running Tesseract : one about missing libraries (the one that you seem to be facing), and one about a wrong locale being set.
The dependency org.bytedeco.javacpp-presets:leptonica-platform is currently not declared in the POM of the Tesseract OCR API, which could be your issue. Can you try to install this dependency in the same wiki, restart XWiki and then see if it helps for the import ?
Thanks,
Clément