Talos docs

particles-effect-unknown

Since 0.7

ctx.particles.play named an effect the scene did not load, so nothing played (it also counts in unwired.particles_emit); said once per name

Plain text
Severitywarning

Meaning

ctx.particles.play named an effect the scene did not load, so nothing played (it also counts in unwired.particles_emit); said once per name

Fix

use a key of scene.assets whose kind is effect, "builtin:smoke" (or another preset), or a *.vfx.json path a particles component already attached