# Web Interface not working- dump1090-Mutability

**URL:** <https://discussions.flightaware.com/t/web-interface-not-working-dump1090-mutability/18355>\
**Category:** ADS-B Flight Tracking\
**Created:** [April 22, 2016, 2:13am UTC](https://discussions.flightaware.com/t/web-interface-not-working-dump1090-mutability/18355 "2016-04-22T02:13:22Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![123none](https://avatars.discourse-cdn.com/v4/letter/1/9de0a6/32.png) [@123none](https://discussions.flightaware.com/u/123none)\
**Post date:** [April 22, 2016, 2:13am UTC](https://discussions.flightaware.com/t/web-interface-not-working-dump1090-mutability/18355/1 "2016-04-22T02:13:22Z")

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I was able to get my dump1090 working with the lighttp web server, but I get the following error:  
Problem fetching data from dump1090.  
AJAX call failed (error: Not Found). Maybe dump1090 is no longer running?  
The displayed map data will be out of date.

What would be the cause of such an issue? Is there something I can do to fix this? Thanks!

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<div class="post-metadata">

**Author:** ![obj](https://sea1.discourse-cdn.com/flex019/user_avatar/discussions.flightaware.com/obj/32/118984_2.png) [@obj](https://discussions.flightaware.com/u/obj)\
**Post date:** [April 22, 2016, 9:53am UTC](https://discussions.flightaware.com/t/web-interface-not-working-dump1090-mutability/18355/2 "2016-04-22T09:53:40Z")

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Did you install via the Debian package? If not have you set up --write-json

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<div class="post-metadata">

**Author:** ![123none](https://avatars.discourse-cdn.com/v4/letter/1/9de0a6/32.png) [@123none](https://discussions.flightaware.com/u/123none)\
**Post date:** [April 23, 2016, 2:05am UTC](https://discussions.flightaware.com/t/web-interface-not-working-dump1090-mutability/18355/3 "2016-04-23T02:05:29Z")

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I installed following this link here:[Flight Radar](http://forum.flightradar24.com/threads/8591-Raspberry-Pi-How-To-Install-Raspian-OS-Dump1090-FR24-Data-Feeder?p=64528&viewfull=1#post64528)  
It looks like the debian package.

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<div class="post-metadata">

**Author:** ![123none](https://avatars.discourse-cdn.com/v4/letter/1/9de0a6/32.png) [@123none](https://discussions.flightaware.com/u/123none)\
**Post date:** [April 26, 2016, 3:11am UTC](https://discussions.flightaware.com/t/web-interface-not-working-dump1090-mutability/18355/4 "2016-04-26T03:11:30Z")

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I dont know if this helps, but the flag that I have set is:

```auto

--aggressive --interactive --net --net-http-port 8080 --net-sbs-port 30003 

```

Perhaps I need to set a different port?