Blank entry page in CP I set a matrix block field for a blog's channel and when I try to create a new entry, It is empty

But if I change the matrix field with another field, it works.

Anyone have an idea? Thanks in advance :)
Had the same issue running OS X running native Apache.  It could be PHP config issue.  Increase the max_nesting_level to something like 200.  Add/edit the following line in your php.ini:

xdebug.max_nesting_level = 200