Yes, I can reproduce the second error now as well, when enforcing the use of Tetgen 1.5 on my Windows laptop (which was defaulted to use 1.4).
Waiting for so input on fixing this.
In the meantime, you could modify the line 378 of process_generate_fem.m to enforce the use of the older Tetgen version (option method='tetgen'), and now you would finally get what I obtained on Windows:
[node,elem] = surf2mesh(newnode, newelem, min(newnode), max(newnode),...
OPTIONS.KeepRatio, factor_bst .* OPTIONS.MaxVol, regions, [], [], 'tetgen');