See https://www.flux.ai/dirk-builds/led-driver-v2-recreation?editor=schematic, or just open fork link https://www.flux.ai/projects/forkProject?documentUid=d20a59e6-4b23-402d-8fbd-995abe3a5aca .

Note that this is a private project

When you try to fork, Flux correctly stops you but there is no user error message, only a infinite spinner. It should show 403 or something.