# Graphql - Error fetching schema

**URL:** <https://community.appfarm.io/t/graphql-error-fetching-schema/2089>\
**Category:** Bug reports\
**Created:** [October 14, 2025, 11:12am UTC](https://community.appfarm.io/t/graphql-error-fetching-schema/2089 "2025-10-14T11:12:23Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![lequeuxa](https://dub1.discourse-cdn.com/flex013/user_avatar/community.appfarm.io/lequeuxa/32/128_2.png) [@lequeuxa](https://community.appfarm.io/u/lequeuxa)\
**Post date:** [October 14, 2025, 11:12am UTC](https://community.appfarm.io/t/graphql-error-fetching-schema/2089/1 "2025-10-14T11:12:23Z")

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Hi,

I can’t use Graphql anymore in our solution Polygone, it says “Error fetching schema” in dev, test, staging but not in prod.

Could you please help. Thanks

 ![image](https://europe1.discourse-cdn.com/flex013/uploads/appfarm/original/2X/d/df90992172aff51e043826cf058d43dccdb61733.png)

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**Author:** ![ulrik](https://dub1.discourse-cdn.com/flex013/user_avatar/community.appfarm.io/ulrik/32/1912_2.png) [@ulrik](https://community.appfarm.io/u/ulrik)\
**Post date:** [October 16, 2025, 9:03am UTC](https://community.appfarm.io/t/graphql-error-fetching-schema/2089/2 "2025-10-16T09:03:08Z")

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We solved this problem through DM´s, however for the people wondering what the problem was:

The reason Graphql outputed “Error fetching schema” is because one of the object class names used the letter “é”. This is an invalid letter that Graphql does not support.

When creating object classes make sure to use the Latin or Roman alphabet (a-z) 😀

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**Author:** ![lequeuxa](https://dub1.discourse-cdn.com/flex013/user_avatar/community.appfarm.io/lequeuxa/32/128_2.png) [@lequeuxa](https://community.appfarm.io/u/lequeuxa)\
**Post date:** [October 16, 2025, 11:54am UTC](https://community.appfarm.io/t/graphql-error-fetching-schema/2089/3 "2025-10-16T11:54:57Z")

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Would be nice to have some validation or object class names & graphql endpoints eventhough it makes sense to me that “é” should not be valid (was an input from a junior dev and difficult to find since we work multiple persons at a time and not access to graphql logs).

Thanks for your fast answer!

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**Author:** ![ulrik](https://dub1.discourse-cdn.com/flex013/user_avatar/community.appfarm.io/ulrik/32/1912_2.png) [@ulrik](https://community.appfarm.io/u/ulrik)\
**Post date:** [October 17, 2025, 6:28am UTC](https://community.appfarm.io/t/graphql-error-fetching-schema/2089/4 "2025-10-17T06:28:55Z")

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I agree. I have created a challenge for better validation/error handlingen.

Kind regards,  
Ulrik