You need to install org.eclipse.wst.sse.ui (that's what the error message says). org.eclipse.wst.sse.ui is provided by Web Tools Platform [1] and not by the eclipse SDK.
[1] http://eclipse.org/webtools/ ** Changed in: eclipse (Ubuntu) Status: New => Invalid -- Cannot install google plugin (GWT, and appengine) https://bugs.launchpad.net/bugs/456051 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs