Hello and thank you – same here – I reverted it per WP Rollback to version 5.5′, now the grid layout is showing up properly.
WordPress Version: 6.9.1 (latest)
PHP Version: 8.4
Every time someone starts editing gallery or lightbox I am (admin) getting the exact same email 🤷♀️ Anyone digging after this error-message? No effect on the page so far.
