No Error Message from Simulate When Loading Model with Invalid Assets

Intro

👋

My setup

MuJoC Simulate App

What's happening? What did you expect?

What happens: When loading a model with a referenced assets that cannot be found, a "Loading" flickers then nothing happens and the simulate window stays blue.

What I expect should happen: error message at the bottom left corner telling me what went wrong.

UPDATE: Any invalid XML does not display the associated error.

Steps for reproduction

Open simulate.
Drag the above XML into the window.

Minimal model for reproduction

<mujoco>
  <compiler angle="radian" meshdir="assets" autolimits="true"/>
  <asset>
    <mesh file="test.stl"/>
  </asset>
  <worldbody>
    <body name="test" pos="0 0 0.445">
      <geom class="visual" mesh="test"/>
      <geom class="collision" size="0.125 0.04 0.057" type="box"/>
    </body>
  </worldbody>
</mujoco>

Code required for reproduction

No response

Confirmations

[X] I searched the latest documentation thoroughly before posting.
[X] I searched previous Issues and Discussions, I am certain this has not been raised before.

google-deepmind / mujoco

No Error Message from Simulate When Loading Model with Invalid Assets #2135