Yup, also panics for me (browser version on MacOS, in chrome)
Here is the error in case it helps:
Caused by:
In Device::create_bind_group_layout
note: label = `ProgressBarMaterial`
Binding 2 entry is invalid
Features Features(VERTEX_WRITABLE_STORAGE) are required but not enabled on the device
Edit: Tried the native MacOS version and it crashes on startup :(