# Problems with Prodigy installation

**URL:** <https://support.prodi.gy/t/problems-with-prodigy-installation/3419>\
**Category:** Getting Started\
**Tags:** install, solved, third-party\
**Created:** [September 20, 2020, 5:24pm UTC](https://support.prodi.gy/t/problems-with-prodigy-installation/3419 "2020-09-20T17:24:58Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![ines](https://sea2.discourse-cdn.com/flex020/user_avatar/support.prodi.gy/ines/32/3_2.png) [@ines](https://support.prodi.gy/u/ines)\
**Post date:** [September 21, 2020, 7:37am UTC](https://support.prodi.gy/t/problems-with-prodigy-installation/3419/2 "2020-09-21T07:37:25Z")

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Hi! It looks like you're running into this problem, which is related to a change in `uvicorn`, one of Prodigy's dependencies:

> [@Getting KeyError '' when launching prodigy](https://support.prodi.gy/t/getting-keyerror-when-launching-prodigy/3203/2):
>
> Hi! It seems like a new version of uvicorn (the library that Prodigy uses for to serve the app) introduced a backwards-incompatible change. We'll release a new Prodigy version with the required change soon, but in the meantime, downgrading uvicorn should fix it:

Downgrading `uvicorn` to 0.11.5 should fix this 🙂

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_[View the full topic](https://support.prodi.gy/t/problems-with-prodigy-installation/3419)._