Can't copy paste and use several shortcuts when editing .java files

For some reason Netbeans behaves weird when editing .java files. There are several weird things that stop working when editing .java files. It only occurs when editing java files.

These things occur:

1. Can not copy paste inside java file (Not with shortcuts or Editmenu)
2. Can not use several shortcuts (like ctrl-s to save while save button in ui works)
3. Context menu does not show when right clicking on java file

How is it possible that Netbeans goes AWAL on me?

Edit: The editor does show some error I added the log info shown as attachments.