Solved:
Undefined variable: possible_slug_name in /public_html/wp-content/plugins/the-events-calendar/src/Tribe/Rewrite.php on line 449
Instead of possible_slug_name I use sanitized_slug here
$needs_handling = apply_filters( ‘tribe_events_rewrite_utf8_handling’,
true,
$permastruct_name,
$sanitized_slug
);
It happens only on admin pages, events are clean.
However going back in the month overview doesn’t work anymore, only the waiting sign is shown. Going to an event in past directly is still working fine. Not sure if there issues are somehow connected.
