Nextcloud Guest App user cannot share files in Talk

Hello everyone, I’m facing the following problem.

When I add a guest user (Guest app) and start a chat with them in Talk, that guest cannot share files in Talk. Even if the guest is assigned a quota of storage space, it is not possible to share images, for example.

But I’m absolutely sure that it worked some time ago.

Nextcloud 24.0.4 and all apps up to date
PHP 8.0