# Common Logs/Errors

***

```lua
ERROR! YOU NEED A KEY IN THE LICENSE.KEY FILE - GET YOUR KEY IN THE SENTINELAC PANEL
```

This error means that you are either missing your `license.key` file, or this file is missing a key inside of it. Please refer to [Installation](/sentinel-anti-cheat/installation.md) to ensure that you properly installed SentinelAC.

***

```
Some sort of Skull Image
```

This error is sent when our system believes you are attempting to use a license that does not belong to you. Make sure to check that the IP of your server matches the one listed on the SentinelAC Web Panel. With any questions, we recommend you contact us in [Our Discord](https://discord.gg/caronetsystems).

***

```lua
[ERROR] Entity Lockdown Mode is Incorrectly Set As X. Please Fix this.
```

This error occurs when your Entity Lockdown Mode is not set properly in your SentinelAC Configuration. Please go to your Server Configuration > Miscellaneous > Ensure that Entity Lockdown Mode has a value set to it.

***

```lua
YOUR LICENSE KEY HAS BEEN SUSPENDED - RENEW YOUR LICENSE OR CONTACT SUPPORT
```

This error occurs when your License has been suspended by CaroNet Systems Administration or you have missed a payment on SentinelAC. Please contact us to get this sorted.

***

```
SentinelAC will not Activate due to some sort of backend error. Please contact us.
```

Be sure to check our [Status Page](https://status.caronetsystems.com/) and Our Discord to ensure that there is no scheduled downtime or any reported issues.

***

```lua
CaroNet Systems™ has Modified Some Resources. It is required to restart your server so these changes can now take place.
```

This log is informing you that SentinelAC installed one or more of its modules into one or more of your server's resources. We request that you restart your server after receiving this message to avoid any issues.

***

```
X Resource Has a Backdoor. Y was Found in This Resource.
```

A backdoor was detected in one or more of your server's resources. We recommend **immediately** stopping this resource and removing it in order to prevent its spread.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.caronetsystems.com/sentinel-anti-cheat/common-logs-errors.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.