Errors 502 after updating

[anastasiaberlyuk]

Hello!

Our students cannot open some tests (we usually use elements "quiz", less often ”assign”). When they try to open the test, they get «502 Bad Gateway» error (startattempt.php script execution error).
Some of them have tis error: "Notice: Undefined property: stdClass::$showstandardinstruction in /var/www/moodle/question/type/multichoiceset/questiontype.php on line 317"

Our tech support thinks this is due to the “all-or-nothing” plugin update (qtype_multichoiceset). Now we have version 1.10.1 (Build 2021070900).
Our Moodle version is 3.11.1+ (Build 20210716).

Please tell how can I solving this problem ?