Troubleshooting

Blank view: check container dimensions, creation errors and frame.diagnostics.
3D scene fails to load: check WebGL2 availability; even a hidden 3D space can require preparation.
Labels have incorrect styling: import the browser stylesheet and preserve its font assets in your bundle.
An object is missing at time zero: check entrance events and replacement-target visibility.
Dragging appears to override animation: clear the corresponding parameter override.
An event fails validation: check the qualified target ID, native coordinate dimension, supported geometry and overlapping property writers.
Edits do not appear: rebuild the engine and demo, or rerun npm run demo.
Port 1431 is occupied: stop the previous demo server before starting another.

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