---
title: "Troubleshooting"
slug: "s3suite94-deploy-install-usingdocker-troubleshooting"
updated: 2026-10-27T18:41:54Z
published: 2026-10-27T18:41:54Z
canonical: "docs.onespan.com/s3suite94-deploy-install-usingdocker-troubleshooting"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.onespan.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Troubleshooting

## Unable to Register a Passkey

When running the Nok Nok Tutorial App and attempting to register a passkey, the app displays the following error message: “Something went wrong. Please try again.”

The configuration of port 443 was not successful. Follow the instructions in [Step 6](/dpoa/docs/s3suite94-install-the-nok-nok-s3-suite#step-6-configure-your-environment-to-use-port-443).

## Out of Memory

If the WSL2 VM instance requires more memory, you can create or edit the .wslconfig file under the powershell home directory:

```plaintext
cd
notepad .wslconfig
```

Here is an example of how to configure the CPUs and memory in the .wslconfig file:

```plaintext
[wsl2]
memory=6GB
processors=max
```

Note that you need to shutdown the WSL2 VM instances and restart WSL2 for this change to take effect. After restarting, use the top command to confirm that your change has taken effect.

## Invalid Reference Format

To run a command that continues on a second line of the terminal, remove all spaces after the backslash on the first line.

## Browser Cannot Resolve Host

*When you run this command* on the **Browser Client System** terminal:

```plaintext
ping nns3-admin.noknokeval.com
```

*You get this output:*

```plaintext
ping: cannot resolve nns3-admin.noknokeval.com: Unknown host
```

*Resolution:*

Check the hosts DNS entry and correct the IP address used. Use ping to verify that the name resolution works.

## Browser Connection Error

*When you run this command* on the **Browser Client System** terminal:

```plaintext
curl -v https://nns3-admin.noknokeval.com:8443/nnladmin
```

*You get this output:*

```plaintext
Trying 157.143.123.2:8443…
Connected to nns3-admin.noknokeval.com (157.143.143.2) port 8443 (#0)
ALPN: offers h2,http/1.1
(304) (OUT), TLS handshake, Client hello (1):
LibreSSL SSL_connect: SSL_ERROR_SYSCALL in connection to nns3-admin.noknokeval.com:8443
Closing connection 0
curl: (35) LibreSSL SSL_connect: SSL_ERROR_SYSCALL in connection to nns3-admin.noknokeval.com:8443
```

*Resolution:*

Check if the Nok Nok Server containers are running. Run the following commands on the **CDT Host System** terminal:

```plaintext
cd ${NN_CDT_HOME}/nns3
docker compose ps -a
```