A warm welcome here in the Roku Community, @Pippi777!
It is highly appreciated that you have reached out to us for Support regarding your network issues. No worries! We're here to help you successfully connect to your internet.
Since you've mentioned that you have purchased a new modem, it may be possible that disruptions have caused this. In this case, we suggest trying to connect it to an alternative network connection to see if it will successfully go through. Perhaps a mobile hotspot would do.
Additionally, kindly confirm what specific Roku device you are experiencing this with and if it scans any available networks near you.
We'll be anticipating your response as we are more than eager to help you utilize your Roku players again and get you back on streaming.
Best regards,
Carly
Carly Y.
Roku Community Moderator