Java JDK 11.0.12
After installing Rapidclipse X, I create a new project. Then create a new GUI element named Test.java. Rapidclipse presents the file Test.ui.xml with a HTTP Status 500 - Internal Server Error.
When I manually open Test.java using "Rapidclipse GUI Editor", I am presented with the normal "GUI canvas". However, I cannot add any visual components to the canvas. Example - drag a Horizontal Layout to canvas and I get the circle with slash that implies "not allowed".
If I reopen the file Test.ui.xml and try to drag a componet to canvas with error status 500 message, I see the normal box that represents a component being dragged, but component does not appear on canvas which is expected but the circle with slash does not appear.
I have re-installed Rapidclipse more than once and on more than one PC. I get the same behavior as described above.
Does anyone have a solution?
Update - I now realize that it is normal to have the file Test.ui.xml to be opened and use this as the canvas to drag components upon (different that prior versions) but I still have "Status 500" error and cannot drag components.