Hello Maxim,
The function add_to_log() has been deprecated with a notice as of Moodle
2.7 (the release will be next monday). The openmeetings moodle plugin is
affected by that change if you are using moodle 2.7 (in the debugging
mode) and the lastest om moodle plugin (1.7 - build 2014031603).
See /mod/openmeetings/view.php in line:
add_to_log($course->id, "openmeetings", "view",
"view.php?id=$cm->id", "$openmeetings->id")
See also:
http://docs.moodle.org/dev/Events_API
http://docs.moodle.org/dev/Event_2
Do you have time to make the necessary adjustments in the om moodle
plugin?
Thanks & Greetings,
Michael