After preparing a glossary and clicking Save Changes, I get this error on a white page:
Fatal error: Call to undefined function get_context_instance() in /var/www/moodle/mod/glossary/view.php on line 47
The glossary will appear on the course page but when I click on it, I get the same error. I deleted the module and added the latest Glossary module and I get the same error. How can I fix this?