Exception - min(): Argument #1 ($value) must contain at least one element

More information about this error

Debug info:

Error code: generalexceptionmessage

Stack trace:

    line 119 of /question/classes/engine/variants/least_used_strategy.php: ValueError thrown

    line 119 of /question/classes/engine/variants/least_used_strategy.php: call to min()

    line 1022 of /question/engine/questionattempt.php: call to core_question\engine\variants\least_used_strategy->choose_variant()

    line 604 of /question/engine/questionusage.php: call to question_attempt->select_variant()

    line 269 of /mod/quiz/locallib.php: call to question_usage_by_activity->start_all_questions()

    line 2059 of /mod/quiz/locallib.php: call to quiz_start_new_attempt()

    line 110 of /mod/quiz/startattempt.php: call to quiz_prepare_and_start_new_attempt()

Output buffer: <div class="notifytiny debuggingmessage" data-rel="debugging">Variant requested for unknown seed localhost+241204052432+GJxjhx. You must add all questions to the usage before creating the least_used_strategy. Continuing, but the variant choses may not actually be least used.<ul style="text-align: left" data-rel="backtrace"><li>line 95 of /question/classes/engine/variants/least_used_strategy.php: call to debugging()</li><li>line 1022 of /question/engine/questionattempt.php: call to core_question\engine\variants\least_used_strategy->choose_variant()</li><li>line 604 of /question/engine/questionusage.php: call to question_attempt->select_variant()</li><li>line 269 of /mod/quiz/locallib.php: call to question_usage_by_activity->start_all_questions()</li><li>line 2059 of /mod/quiz/locallib.php: call to quiz_start_new_attempt()</li><li>line 110 of /mod/quiz/startattempt.php: call to quiz_prepare_and_start_new_attempt()</li></ul></div>