This might help:
https://docs.moodle.org/26/en/admin/environment/php_setting/opcache.enable
Just FYI; I tried the "Required for Moodle" settings and then the "If something doesn't work..." settings and neither made any difference.
General help
Zend opcache segfault loading admin/index.php
This discussion has been locked so you can no longer reply to it.