Issue Description: Unfortunately "/dynmap radiusrender" doesn't work anymore since the update to 1.19.
Chatt:
Render of 10 block radius starting on world 'world'
Radius render of map 'flat' of 'world' completed - 0 titles rendered (0,00 msec/map-title, 0,00 msec per render)
Radius render of map 'surface' of 'world' completed - 0 titles rendered (0,00 msec/map-title, 0,00 msec per render)
Radius render of map 'cave' of 'world' completed - 0 titles rendered (0,00 msec/map-title, 0,00 msec per render)
Radius render of 'world' finished.
This comes in chat in 1 second. I've tried other places, but the result is always the same.
The command: "/dynmap fullrender world" works normally.

• Dynmap Version: 3.4-beta-4
• Server Version: 1.19
• Steps to Replicate: Use the "radiusrender" command

[X] I have looked at all other issues and this is not a duplicate
[X] I have been able to replicate this

@mikeprimm i think it was fixed in #3794 , had this issue while testing and then fixed it in same pr
@PatrickBronke can you test the beta5?

i think it's related to refusing to work with loaded chunks, and only with saved ones, same issue i had and which i fixed (and since it's broken with 1.19, when async chunk load support came, more reasons to think it was it)

command requires a radius - '/dynmap radiusrender 20' for example. Just checked it, and it appears to be working as normal.

Hey Mike, I just tested it with core=3.4-SNAPSHOT-813, plugin=3.4-SNAPSHOT-813, and it still seems to be broken:

so it's a paper 1.19 issue, indeed in 1.19.1 it works, but in 1.19.0 it didn't

Same build, spigot-1.19.1:

Hi @mastermc05 . It is all ok.