Support Minecraft 1.21.6 released recently.

Here we can see that when the server starts up it shows an error

And when running /bluemap from the console the server crashes

I attach here the logs:

latest.log
crash-2025-06-18_02.59.38-server.txt

Depending on the platform, it may already work.
For example, this evening, someone reported that BlueMap-5.7-spigot.jar works on paper 1.21.6.
And yes, BlueMap will be updated wherever necessary.

Okay, thanks.

In fabric it does not work, when using the /bluemap command it crashes.

Please send the crash log, then

BlueMap will be updated.