At least it’s triggering the uploader now.
The maple uploader is expecting you to have an (older) Java version installed. See Uploading Issue with STM32F103C8T6 Varient(Bluepill) via USB - #4 by maxgerhardt
Though I’m also able to invoke it with later Java versions, but haven’t tested that.
>java --version
java 23.0.1 2024-10-15
Java(TM) SE Runtime Environment (build 23.0.1+11-39)
Java HotSpot(TM) 64-Bit Server VM (build 23.0.1+11-39, mixed mode, sharing)