Problem when switching from google

When trying to transfer files from Google Drive to NextCloud (it is installed on my hosting service + domain) I receive the following errors:

Would anyone know why this happens? I am using air explorer

Like this, we need more information from the remote host because it is the remote host closing the connection. If you have logs from the server, this can perhaps help to see if it is Nextcloud itself (limit on something), a limit of the webserver, or some network setting …