Version 1.21 The server cannot retrieve the image

[HY916-cn]

After entering the correct command, the error message is displayed. The only solution is to restart the server. The URL can be opened or downloaded in the browser normally. This problem applies to all (all photos, all players cannot generate map pictures)

help me pls!!! thx!!!

[FaNt4zMa]

I've just tested and it won't work with webp images. In my case, a png worked. I think @Patbox should probably mention this crucial detail on the mod page :)