This is the first build for eclipse-2021-12 and eclipse-2022-03. Other Versions are not testet
Need to cleanup lots of dependencies, but this version installs just fine.
Currently SDBG Debugger is not included, but it can be installed separately. May be next Version.
To install you need an eclipse installation where GWT has never been installed.
Download the zip file, and add it as Software Site. Then select the site and install.