# Ujson error while installing rasa

**URL:** <https://forum.rasa.com/t/ujson-error-while-installing-rasa/29189>\
**Category:** Rasa Open Source\
**Created:** [May 22, 2020, 8:30am UTC](https://forum.rasa.com/t/ujson-error-while-installing-rasa/29189 "2020-05-22T08:30:54Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![kartikay1999](https://avatars.discourse-cdn.com/v4/letter/k/49beb7/32.png) [@kartikay1999](https://forum.rasa.com/u/kartikay1999)\
**Post date:** [May 22, 2020, 8:30am UTC](https://forum.rasa.com/t/ujson-error-while-installing-rasa/29189/1 "2020-05-22T08:30:54Z")

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![image](https://europe1.discourse-cdn.com/flex013/uploads/rasa/original/2X/9/9b713fa0cc402987a290a7a6c0d9bc01955d10bc.png)

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**Author:** ![tyd](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.rasa.com/tyd/32/3030_2.png) [@tyd](https://forum.rasa.com/u/tyd)\
**Post date:** [May 25, 2020, 7:26am UTC](https://forum.rasa.com/t/ujson-error-while-installing-rasa/29189/2 "2020-05-25T07:26:03Z")

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@kartikay1999 Since you are using windows, did you first install the Microsoft VC++ Compiler?

From the [install docs](https://rasa.com/docs/rasa/user-guide/installation/):

> Make sure the Microsoft VC++ Compiler is installed, so python can compile any dependencies. You can get the compiler from [Visual Studio](https://visualstudio.microsoft.com/visual-cpp-build-tools/). Download the installer and select VC++ Build tools in the list.