I have installed the Flowable designer in Eclipse 2024-03. I was able to create a new Flowable project, but when I tried to create a new BPMN diagram, I got the following error: class org.eclipse.jdt.internal.core.JavaNature cannot be cast to class org.eclipse.jdt.core.IJavaProject (org.eclipse.jdt.internal.core.JavaNature and org.eclipse.jdt.core.IJavaProject are in unnamed module of loader org.eclipse.osgi.internal.loader.EquinoxClassLoader @2f476789)
I installed the Eclipse version for diagram-based application development which included ecore and Java Development Tools.