davfs2 not working / Nextcloud

I installed `davfs2` with the goal to implement a nextcloud user.

With `mount -t davfs https://cloud.tld /root/cloud` I could enter username and password perfectly but then the following error appeared:

```
warning:` the server does not support locks
loading kernel module fuse
modprobe: can't change directory to '/lib/modules': No such file or directory
loading kernel module fuse failed
waiting for /dev/fuse to be created
can't open fuse device
mount: mounting https://cloud.<…>/remote.php/webdav/ on /root/cloud failed: Invalid argument
```

Is there a way to solve it?
Has anyone got `davfs2` working?

Thanks.