'Parsing metadata' has encountered a problem. NPE [was #7788]
Error only occurs one time, when no workspace-folder exists. (on Linux-64bit)
How to get there:
1. unzip lab, or delete workspace data from existing lab install.
2. start lab and login (as testuser)
3. close welcome-screen and choose "edit xml" perspective
4. open navigator-view
5. open a file in navigator, e.g. tttest->"crud test 2"
Now a window pops up "'Parsing metadata' has encountered a problem. [...]" there seems to be no usefull stacktrace available.