OMERO extension error in QuPath

[NicoKiaru]

I get this message on a fresh windows install:

Error loading extension qupath.ext.biop.servers.omero.raw.OmeroRawExtension@5c7c538d: omero/ServerError
java.lang.NoClassDefFoundError: omero/ServerError
	at qupath.ext.biop.servers.omero.raw.OmeroRawExtension.installExtension(OmeroRawExtension.java:99)
	at qupath.lib.gui.ExtensionManager.refreshExtensions(ExtensionManager.java:148)
	at qupath.lib.gui.QuPathGUI.<init>(QuPathGUI.java:345)
	at qupath.lib.gui.QuPathGUI.createInstance(QuPathGUI.java:451)
	at qupath.lib.gui.QuPathApp.start(QuPathApp.java:65)
	at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$9(LauncherImpl.java:839)
	at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$12(PlatformImpl.java:483)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:456)
	at java.base/java.security.AccessController.doPrivileged(Unknown Source)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$11(PlatformImpl.java:455)
	at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
	at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
	at com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:185)
	at java.base/java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: omero.ServerError
	at java.base/java.net.URLClassLoader.findClass(Unknown Source)
	at java.base/java.lang.ClassLoader.loadClass(Unknown Source)
	at java.base/java.lang.ClassLoader.loadClass(Unknown Source)
	... 14 more