We need a little bit more information to address your issue.
What's JDK version are you using? Are your all jobs failing to build with this
"java.lang.NullPointerException" Error or a specific one?
If the former, we are suspecting that it may have been caused by your broken project folder or this could also have been caused by a broken Workspace folder.
You could need create a new *workspace* and a new project and imported all jobs and related schemas etc.
