If I change
'page.update:before' => function ($page, $values, $strings) {
to
'page.update:after' => function ($page, $values, $strings) {
I get this error from panel:
Exception: ArgumentCountError
Too few arguments to function Kirby\Cms\App::{closure}(), 2 passed and exactly 3 expected.
And If I change to:
'page.update:after' => function ($page) {
Nothing happen on save…