by Jose Perez.
Hi Guys,
Today I had the same error message. Found out that it the moodle data directory was inside the moodle directory so it got moved when I renamed the directory moodle to moodle_old. Copied the moodledata directory to another place (outside the moodle directory as recomended) and updated the config.php to reflect the new location. Problem solved.
Hope this helps.
Jose Perez Bobadilla
SDT Learning, Corp.