# ruamel.yaml.scanner.ScannerError: while scanning a simple key

**URL:** <https://forum.rasa.com/t/ruamel-yaml-scanner-scannererror-while-scanning-a-simple-key/28688>\
**Category:** Rasa Open Source\
**Created:** [May 11, 2020, 12:06pm UTC](https://forum.rasa.com/t/ruamel-yaml-scanner-scannererror-while-scanning-a-simple-key/28688 "2020-05-11T12:06:47Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Prskriti](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.rasa.com/prskriti/32/4993_2.png) [@Prskriti](https://forum.rasa.com/u/Prskriti)\
**Post date:** [May 11, 2020, 12:06pm UTC](https://forum.rasa.com/t/ruamel-yaml-scanner-scannererror-while-scanning-a-simple-key/28688/1 "2020-05-11T12:06:47Z")

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Could you please help me in resolving this error. Here is the snapshot of the error message.

 ![18%20PM](https://europe1.discourse-cdn.com/flex013/uploads/rasa/original/2X/a/a6a06602fb81b1c83af17a51166546314b730e20.jpeg)

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**Author:** ![saurabh-m523](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.rasa.com/saurabh-m523/32/7887_2.png) [@saurabh-m523](https://forum.rasa.com/u/saurabh-m523)\
**Post date:** [May 12, 2020, 4:16am UTC](https://forum.rasa.com/t/ruamel-yaml-scanner-scannererror-while-scanning-a-simple-key/28688/2 "2020-05-12T04:16:10Z")

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Hi @Prskriti!

It seems like some issue with the yml files. Check your config and domain files or any other yml files you might be using.

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**Author:** ![Prskriti](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.rasa.com/prskriti/32/4993_2.png) [@Prskriti](https://forum.rasa.com/u/Prskriti)\
**Post date:** [May 12, 2020, 9:48am UTC](https://forum.rasa.com/t/ruamel-yaml-scanner-scannererror-while-scanning-a-simple-key/28688/3 "2020-05-12T09:48:31Z")

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Yeah problem was in credentials.yml file. Thanks!