There can be a number of reasons, so the best you can do is following the advice given at http://docs.moodle.org/en/Installation_FAQ#Why_is_a_particular_page_blank_or_incomplete.3F
Saludos. Iñaki.
There can be a number of reasons, so the best you can do is following the advice given at http://docs.moodle.org/en/Installation_FAQ#Why_is_a_particular_page_blank_or_incomplete.3F
Saludos. Iñaki.