# Error Code 403
**URL:** https://community.cesium.com/t/error-code-403/29057
**Category:** Cesium for Unreal
**Created:** [January 3, 2024, 11:25am UTC](https://community.cesium.com/t/error-code-403/29057 "2024-01-03T11:25:12Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@spiros\_anatolianos](https://community.cesium.com/u/spiros_anatolianos)
#### Post date: [January 3, 2024, 11:25am UTC](https://community.cesium.com/t/error-code-403/29057/1 "2024-01-03T11:25:12Z")
Hello and a Happy new year,
I am trying to connect to Cesium ion for Unreal but I get the following error. Can you please advise if I am missing something, I have tried disabling firewall and antivirus but still getting the same error.
> **···**
>
> ## Not authorized!
>
> The authorization failed with the following error message: The server returned an error code: 403.
>
> Please close this window and return to Cesium for Unreal.
>
> If the problem persists, contact our support at [support@cesium.com](mailto:support@cesium.com).
>
> Regards,
>
> Spiros
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### Author:  [@Shehzan\_Mohammed](https://community.cesium.com/u/Shehzan_Mohammed)
#### Post date: [January 3, 2024, 3:46pm UTC](https://community.cesium.com/t/error-code-403/29057/2 "2024-01-03T15:46:53Z")
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### Author:  [@Kevin\_Ring](https://community.cesium.com/u/Kevin_Ring)
#### Post date: [January 8, 2024, 1:16am UTC](https://community.cesium.com/t/error-code-403/29057/3 "2024-01-08T01:16:29Z")
The most likely cause of errors like that is that your network requires the use of a proxy in order to do HTTP POST requests, and Unreal Engine isn’t using that proxy. Unreal Engine unfortunately doesn’t automatically use a proxy if one is configured on your system. I can’t test it as I don’t have a proxy myself, but some users have reported success in the past by setting the `HTTP_PROXY` and `HTTPS_PROXY` environment variables.