Author: Andrew Davis
message MDL-25114 tried to make the message provider not found error info more helpful
http://git.moodle.org/gw?p=moodle.git;a=commit;h=a6de5ed53a65300fbe21404b93e76f56428ce24f
http://github.com/moodle/moodle/commit/a6de5ed53a65300fbe21404b93e76f56428ce24f
+ 2.0 en [couldnotfindpreference,core_message]