Try connecting to node 2100. I had a problem connecting to 5 and 6 digit node numbers when I switched to ASL3. Similar to the the issue in this post.
I could connect to 4 digit nodes like 2100 but not 5 or 6 digit nodes.
I have a Pihole DNS server/ad blocker on my LAN. I fixed it by installing resolvconf on the box running ASL3.