"No messages in this mailbox "

I’m using NC25.0.1 with Mail 2.2.2.

I set up NC Mail with a iCloud mail account, but whenever I try to use it it shows " No messages in this mailbox". I can see that it’s connected as the unread email counter works fine, and I can send emails out, but I cannot see any inbound emails.

does data/nextcloud.log have any errors logged with “app”:“mail”?

@ChristophWurst I don’t see any log messages for the mail app.

root@nextcloud ~ cat /var/www/nextcloud-data/nextcloud.log | grep -i mail
root@nextcloud ~