There are new updates on GitHub. It includes fixes for the error you found that was causing the blank screens. It also corrrects a few issues in some update functions, plus the issues causing the strict warning messages were corrected. Any feedback would be appreciated.
Pedigree looks like a very interesting module. The unique domain logic of the coefficient of inbreeding calculations, and the various pedigree charts look quite useful. It does have a very dated look, but updating the UI would be a very worthwhile effort since the underlying logic is so specific. I'm not sure I will have the time to devote to that right now, but I do have a client that might be interested -- that can change the priorities quickly.
Thanks again.