Hi!
After the update to 25.0.0 RC2, I am getting that error with Talk-App, too:
I can´t get my NC to work again
[Sun Oct 02 16:16:25.608734 2022] [proxy_fcgi:error] [pid 2832842:tid 140188017727232] [client 78.31.xxx.xxx:x] AH01071: Got error ‘PHP message: PHP Fatal error: Declaration of OCA\Talk\Share\RoomShareProvider::getSharesInFolder($userId, OCP\Files\Folder $node, $reshares): array must be compatible with OCP\Share\IShareProvider::getSharesInFolder($userId, OCP\Files\Folder $node, $reshares, $shallow = true) in /var/www/vhosts/xxx.de/httpdocs/nx/apps/spreed/lib/Share/RoomShareProvider.php on line 520’