My server, 33.0.3 has many of these errors in the log.
``
[dav_push] Error: transport web-push failed to deliver notification to subscription 17. error message: Client error: POST https://fcm.googleapis.com/fcm/send/dV_NfuU1yNc:APA91bHcKOEr1LnWm0sTVv7oXOE8-jJ1eCM8nyO4a5F901isSUlHL6O4Td9_YenyB39kp0OX6iC1GWOWTKR9XUIuIFk1qlIjfYriOzf5lDMjVNESOwBNPWYG8l8coBjpvcF4hKYI_RBc resulted in a `410 Gone` response:
push subscription has unsubscribed or expired.
thrown in /var/www/nextcloud/apps/dav_push/lib/PushTransports/WebPushTransport.php:345
PUT /nextcloud/remote.php/dav/calendars/user1/personal/699ecbca-f0f4-4c69-971d-3fb62e5a4427.ics
from 192.168.1.1 by user1 at Jun 14, 2026, 10:02:07 a.m.
``
Errors go back about a month, probably when dav_push was installed to support DAVx5 push.
My server, 33.0.3 has many of these errors in the log.
``
[dav_push] Error: transport web-push failed to deliver notification to subscription 17. error message: Client error:
POST https://fcm.googleapis.com/fcm/send/dV_NfuU1yNc:APA91bHcKOEr1LnWm0sTVv7oXOE8-jJ1eCM8nyO4a5F901isSUlHL6O4Td9_YenyB39kp0OX6iC1GWOWTKR9XUIuIFk1qlIjfYriOzf5lDMjVNESOwBNPWYG8l8coBjpvcF4hKYI_RBcresulted in a `410 Gone` response:push subscription has unsubscribed or expired.
thrown in /var/www/nextcloud/apps/dav_push/lib/PushTransports/WebPushTransport.php:345
PUT /nextcloud/remote.php/dav/calendars/user1/personal/699ecbca-f0f4-4c69-971d-3fb62e5a4427.ics
from 192.168.1.1 by user1 at Jun 14, 2026, 10:02:07 a.m.
``
Errors go back about a month, probably when dav_push was installed to support DAVx5 push.