"App recommendation" notifications

I have identified that this app generates App Recommendation notifications that appear in Gnome Notifications. However, the links are non-functional and do not open Software app, or other page. Upon clicking notification, the notification will simply dismiss itself.

I currently set this app to open at login, so I get these types of notifications each time i login.


I identified Nextcloud as the source of these notifications by using "dbus-monitor interface=org.freedesktop.Notifications" as recommended here:
https://discussion.fedoraproject.org/t/gnome-notification-panel-bugs/23547/3?u=barn

Snippit of output:

```
method call time=1600971525.783647 sender=:1.58 -> destination=:1.29 serial=23 path=/org/freedesktop/Notifications; interface=org.freedesktop.Notifications; member=Notify
string "Nextcloud"
uint32 0
string "Nextcloud"
string "App recommendation: Deck"
string ""
array [
]
array [
dict entry(
string "desktop-entry"
variant string "com.nextcloud.desktopclient.nextcloud"
)
dict entry(
string "sender-pid"
variant uint32 3769497
)
]
int32 -1
method call time=1600971525.784207 sender=:1.58 -> destination=:1.29 serial=24 path=/org/freedesktop/Notifications; interface=org.freedesktop.Notifications; member=Notify
string "Nextcloud"
uint32 0
string "Nextcloud"
string "App recommendation: Social"
string ""
array [
]
array [
dict entry(
string "desktop-entry"
variant string "com.nextcloud.desktopclient.nextcloud"
)
dict entry(
string "sender-pid"
variant uint32 3769497
)
]
int32 -1
method call time=1600971525.787636 sender=:1.98 -> destination=org.freedesktop.Notifications serial=52 path=/org/freedesktop/Notifications; interface=org.freedesktop.Notifications; member=Notify
string "Nextcloud"
uint32 0
string "Nextcloud"
string "App recommendation: Group folders"
string ""
array [
]
array [
dict entry(
string "desktop-entry"
variant string "com.nextcloud.desktopclient.nextcloud"
)
]
int32 -1
```

Full log:
[dbus.log](https://github.com/flathub/com.nextcloud.desktopclient.nextcloud/files/5278324/dbus.log)

When I go to Gnome Settings > Notifications, I do not see Nextcloud in the app list, so I am not sure how to disable these notifications.

Preferred solution:
1) Clarification on how to disable these notifications. (2) It would also be nice if I could access what the app is recommending.