Eclipse – CTRL+Space autocompletion does not work any more for Java

In my Eclipse workspace, CTRL+Space does not provide any suggestions since a while. The suggestion popup appears but stays empty. Toggling between default proposals and others like Template proposals does not help.

It started some days ago with an error message which I unfortunately clicked away too quickly. I’ve tried already to start Eclipse with -clean option which did not help.

My Eclipse version is 2020-06 (4.16.0).


Go to Preferences » Java » Editor » Content Assist » Advanced.
Make sure Other Java Proposals is ticked/checked

Source: stackoverflow