It is not clear why the admin panel does not work?

Question

1C-Bitrix

The admin panel stopped working after the update.
Tell me where the "dog" is closed?

[TypeError]
call_user_func_array(): Argument #1 ($function) must be a valid callback, class BXProjectUpdater does not have a method "onBuildGlobalMenu" (0)
/home/www/bitrix/modules/main/classes/general/module. php:480

Answer 1

after update.

here it is buried - the author of the module put it on BC ....

Answer 2

Check that your php version is the one that is supported by the Bitrix version to which you updated the code.
Modern Bitrix requires php 7.3 and higher.