{"error":"A required parameter (b) was missing","errorcode":"missingparam","stacktrace":"* line 620 of \/lib\/moodlelib.php: moodle_exception thrown\n* line 37 of \/badges\/assertion.php: call to required_param()\n","debuginfo":"\nError code: missingparam","reproductionlink":"http:\/\/moodle.ewca.gov.et\/"}