Error messages during a simulation call

Last updated: November 10, 2026

Voice and video simulations show a message when a call cannot start, ends early, or cannot be scored. This lists those messages, what each one means and what to do next. Use it to tell apart the ones a learner can fix on their own device and the ones that need an admin or the Solidroad team.


Microphone and camera

These are all on the learner's own device, and the learner has to fix the issue. Nothing needs to change in your Solidroad workspace.

Message

What to do

Microphone access was blocked. Allow microphone permissions in your browser settings to continue.

Allow the browser to use the microphone, then start the attempt again.

No microphone was available. Check that it is connected, that your computer's privacy settings let your browser use it, and that no other app is using it.

Connect a microphone, then check that the computer's privacy settings let the browser use it.

We couldn't start your microphone. Close any other app that might be using it, then try again.

Close anything else holding the microphone, such as a meeting left open in another window.

We couldn't access your default microphone. Please select a device to continue.

Choose a different microphone.

Camera access was blocked. Allow camera permissions in your browser settings to continue.

Allow the browser to use the camera, then start the attempt again.

No camera was available. Check that it is connected, that your computer's privacy settings let your browser use it, and that no other app is using it.

Connect a camera, then check the computer's privacy settings.

We couldn't start your camera. Close any other app that might be using it, then try again.

Close anything else using the camera.

We couldn't access your default camera. Please select a device to continue.

Choose a different camera.

Your browser is waiting for you to allow your camera and microphone. Allow access in the browser prompt, then try again.

Answer the permission prompt in the browser, then try again.

Network and firewall

A VPN or a corporate firewall is the usual cause. Trying a different network is the quickest way to test it.

Message

What to do

We can't reach the voice service from your network. If this keeps happening, ask your IT team.

Try a different network. If it keeps happening, ask IT to allow the voice service.

We couldn't connect to the voice service. Check your network or firewall settings and try again.

Turn off any VPN and try again.

The voice service closed the call before your audio reached it. Check your network or firewall settings and try again.

Turn off any VPN and try again. The learner's audio did not get through in time.

Your connection to the voice service dropped, so the call ended. Check your network, then start a new attempt.

Move to a steadier connection, then start a new attempt.

The call will not start

A second tab, a refresh or a double-click causes several of these. The rest are worth retrying once, and if one keeps coming back, send the Solidroad team the simulation name and roughly when it happened.

Message

What to do

This learner already has an unfinished attempt on the assignment

The learner resumes or finishes the attempt they already have.

This attempt already has a call in flight

The call is already open somewhere, usually another tab. Close it, then start again.

This call has already been connected

The same call is connected elsewhere. Close the other tab.

This attempt is finished, so it cannot start a call

Start a new attempt. This one has already ended.

This simulation now runs on a different channel, so open it again

The simulation was changed to another channel while the learner had it open. Reload the page.

This workspace has reached its simulation limit

The workspace has hit its plan limit. Contact the Solidroad team.

This workspace is closed

The workspace is no longer active. Contact the Solidroad team.

All voice sessions are currently busy. Please wait a moment and try again.

Wait a moment, then start the attempt again. There were no free voice sessions.

The call failed to start. Please try again.

Start the attempt again. Setup failed before the call began.

We couldn't set up the call. Please try again.

Start the attempt again.

Something went wrong with the call. Please try again.

Start the attempt again. This one covers any failure with no clearer cause.

The call ended early

Message

What to do

The session reached its time limit and ended.

Nothing is wrong. The call ran to the limit set on the simulation.

This session is no longer available. Start a new attempt to continue.

Start a new attempt. The old one had expired.

The voice service ended the call unexpectedly. Start a new attempt to continue.

Start a new attempt.

The conversation ended because of a voice service error. Please try again.

Start a new attempt. Nothing the learner did caused this.

The conversation ended because of an AI model error. Please try again.

Start a new attempt.

The conversation ended unexpectedly. Please try again.

Start a new attempt. Contact the Solidroad team if it happens more than once.

The attempt was not scored

None of these attempts are scored. The last three are Solidroad's fault and say so in the message.

Message

What to do

We didn't detect any audio from you during the call. Check that your microphone is connected and unmuted, then try again.

Check that the microphone is unmuted and that the right device is selected, then try again.

The call ended before we heard you, so it hasn't been scored. If you were speaking, check that your microphone is connected and unmuted, then try again.

The call ended before anyone spoke. If the learner was speaking, check the microphone.

We stopped receiving what you said partway through this call, so it hasn't been scored. This was a problem on our side. Please try the attempt again.

Take the attempt again.

The AI never spoke during this call, so it hasn't been scored. This was a problem on our side. Please try the attempt again.

Take the attempt again.

The AI stopped responding during this call, so it hasn't been scored. This was a problem on our side. Please try the attempt again.

Take the attempt again.

The simulation needs changing

These two need an admin. The learner cannot do anything about either.

Message

What to do

This scenario's voice is misconfigured. An admin needs to fix the AI persona before this can run.

Open the persona used by the simulation and set its voice. See Persona settings.

There's a problem with this simulation, so it can't start. Contact your administrator.

Open the simulation and check its content. It is too large or otherwise invalid to start a call.

Video and recordings

Message

What to do

We couldn't receive the video stream for this session.

Check the camera and the network, as for the camera messages above.

The recording for this session isn't available yet.

The recording is still processing. Look again shortly.

If that doesn't work

Send the Solidroad team the exact message, the name of the simulation, the learner's name and roughly when it happened. A screenshot of the message helps.


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If you have any further questions, contact the Solidroad team via the Help tab in the platform.