I’d assume there are no ways around koors 0.01/0.08?
What should I do?
What would you like to do? You could use the “Download from OSM” tab instead of using Overpass for example.
I heard from friends that some plug-ins need to be installed so that josm can be used normally, but I don’t know which ones
Mmh, that is strange. Maybe something is blocking access. May I ask where you are located?
Concerning plug-ins: yes, there are some very useful plug-ins, but you can use JOSM perfectly without those as well. So that should not be the problem here.
I am from China
That could be a reason. Maybe OSM content is blocked by the government. But to be honest, I am not too familiar with what is currently blocked. Let’s just wait a moment for more people to read this thread, maybe someone else can help.
yes, from your screenshots it looks as if there are network problems
Is https://www.openstreetmap.org/ showing map for you?
Maybe it would be wise to ask the China community, they should know if OSM content may be blocked and how to deal with it.