PDF Export fails with Null-Pointer-Exception

When trying to export a PCA-Plot as PDF, MEGAN 6.5.8 (Linux) throws a Null-Pointer-Exception. The file is created but is empty (it has a size of 0 bytes)
The export of the pca-plot as jpg works just fine.
The export of a Bar-Plot as PDF also works.


Thanks for the bug report, the next release will contain a bug fix