# Problem logging in after installing Wowza Streaming Engine.

**URL:** <https://community.wowza.com/t/problem-logging-in-after-installing-wowza-streaming-engine/102842>\
**Category:** Wowza Streaming Engine\
**Created:** [July 12, 2026, 6:16pm UTC](https://community.wowza.com/t/problem-logging-in-after-installing-wowza-streaming-engine/102842 "2026-07-12T18:16:35Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![ml1000001](https://avatars.discourse-cdn.com/v4/letter/m/5f8ce5/32.png) [@ml1000001](https://community.wowza.com/u/ml1000001)\
**Post date:** [July 12, 2026, 6:16pm UTC](https://community.wowza.com/t/problem-logging-in-after-installing-wowza-streaming-engine/102842/1 "2026-07-12T18:16:35Z")

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I installed Wowza Streaming Engine 4.11.0+24 on Windows 10 and applied for a trial license from the official website. After completing the installation, the Wowza service is up and running. However, I cannot access the web interface via `localhost:8088`, and when I try to access `localhost:8087`, I get a license error with the message “License 402” or “Invalid license key.”

 ![image](https://us1.discourse-cdn.com/flex002/uploads/wowza1/original/2X/7/7d7d93b05c6a77dc7b43d5d2965498ff75e4da88.png)

 ![image](https://us1.discourse-cdn.com/flex002/uploads/wowza1/original/2X/d/de950a4b14896fff6b8abb01643b920078753d4b.png)

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**Author:** ![Vihari\_Kumar](https://avatars.discourse-cdn.com/v4/letter/v/87869e/32.png) [@Vihari\_Kumar](https://community.wowza.com/u/Vihari_Kumar)\
**Post date:** [July 13, 2026, 8:25am UTC](https://community.wowza.com/t/problem-logging-in-after-installing-wowza-streaming-engine/102842/2 "2026-07-13T08:25:20Z")

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Hello [ml1000001@126.com](mailto:ml1000001@126.com)

Thank you for reaching out to us via Wowza Forum.

We would request you to create a Support Ticket with the Wowza Support through the **[Wowza Support portal](https://www.wowza.com/support/open-ticket "Wowza Support portal")**.

To expedite the troubleshooting, I request you to provide the conf/ and logs/ directory with us along the reproduction steps.

We look forward to hearing from you.

Regards,  
**Vihari Kumar**  
Technical Support Engineer

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**Author:** ![Karel\_Boek](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/karel_boek/32/454_2.png) [@Karel\_Boek](https://community.wowza.com/u/Karel_Boek)\
**Post date:** [July 13, 2026, 6:51pm UTC](https://community.wowza.com/t/problem-logging-in-after-installing-wowza-streaming-engine/102842/3 "2026-07-13T18:51:20Z")

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Hi @ml1000001 , you may also check [Troubleshooting Wowza Streaming Engine Configuration Issues | Wowza](https://www.wowza.com/blog/troubleshooting-wowza-streaming-engine-configuration-issues) (under “REST API Authentication Failures”).

Check in the logs [if your WSE does see a valid license](https://www.wowza.com/docs/troubleshoot-wowza-streaming-engine-licensing-errors-at-startup) and make sure that your machine is able to reach the Wowza license servers.