"You need to wait until you have at least 4 connections to the Bitcoin network"

I am trying to buy some Bitcoin, but when I press the button “Take offer to buy Bitcoin”, I get the message “You need to wait until you have at least 4 connections to the Bitcoin network”.
What does that mean?
What can I do about resolving this issue so that I can but the Bitcoin?
Is the trade locked until the issue is resolved or can the seller move on to another buyer?

Maybe you are having issues connecting to Bitcoin nodes.
You might want to try changing your settings in Bisq for connecting to Bitcoin nodes.
Perhaps you can try setting custom nodes.

No, I think Bisq is just not letting you take the offer, but the offer still stands for everyone else.

Are you using the provided Bitcoin nodes (settings/network)? If so and you still have issues please check your internet connection. You should get connected to about 8 nodes without problems.

Same here. It’s happening all the time since last week. Sometimes works when I close Bisq Software and open it again.

Just reviewing this thread that I started. The problem went away after a time, but I have no idea still why it occurred or how it resolved itself. Restarting the Biusq app did not work. @alexej996 wrote: “You might want to try changing your settings in Bisq for connecting to Bitcoin nodes. Perhaps you can try setting custom nodes.” Such advice may be understandable to a long-time user of the app, but I do not know how to do this and there does not seem to be a FAQ about it.