# Captcha returns blank

**URL:** <https://community.auth0.com/t/captcha-returns-blank/149872>\
**Category:** Get Help\
**Tags:** classic-universal-login-experience, login-experience\
**Created:** [October 14, 2024, 8:08pm UTC](https://community.auth0.com/t/captcha-returns-blank/149872 "2024-10-14T20:08:20Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![shinkhouse](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/shinkhouse/32/59947_2.png) [@shinkhouse](https://community.auth0.com/u/shinkhouse)\
**Post date:** [October 14, 2024, 8:08pm UTC](https://community.auth0.com/t/captcha-returns-blank/149872/1 "2024-10-14T20:08:21Z")

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Hey there, when I enable Auth Challenge or hCaptcha (with sitekey and secret key), the recaptcha text is blank and not appearing. When I click refresh, it does not load. Any suggestions? I verified that my sitekey and secret key are matching and successful with hCaptcha test website.  
 ![Screenshot 2024-10-14 at 3.08.50 PM](https://global.discourse-cdn.com/auth0/original/3X/9/0/90d9f8e4fd160263e0f425dbaa9458597588683c.png)

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**Author:** ![dawid.matuszczyk](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/dawid.matuszczyk/32/74550_2.png) [@dawid.matuszczyk](https://community.auth0.com/u/dawid.matuszczyk)\
**Post date:** [October 15, 2024, 11:15am UTC](https://community.auth0.com/t/captcha-returns-blank/149872/2 "2024-10-15T11:15:48Z")

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Hi @shinkhouse

Welcome back to the Auth0 Community!

Thank you for posting your question, can you check in the Developer Tools if you see any error while trying to login? I’ve checked your configuration and lock.js version in the Classic Universal Login and it’s properly set.

Thanks  
Dawid

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<div class="post-metadata">

**Author:** ![shinkhouse](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/shinkhouse/32/59947_2.png) [@shinkhouse](https://community.auth0.com/u/shinkhouse)\
**Post date:** [October 15, 2024, 2:48pm UTC](https://community.auth0.com/t/captcha-returns-blank/149872/3 "2024-10-15T14:48:19Z")

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Hey @dawid.matuszczyk, thanks for your reply. I figured out shortly after I posted this that our Lock SDK version was not the minimum required version of 12.4.0. After I found that information in flow limitations, I updated it and it started to work.

[Bot Detection](https://auth0.com/docs/secure/attack-protection/bot-detection#flow-limitations). This can be marked as closed.

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**Author:** ![system](https://global.discourse-cdn.com/auth0/original/3X/b/5/b560f266932fcce5d57f09a6595bd50518cae3f3.jpeg) [@system](https://community.auth0.com/u/system)\
**Post date:** [October 29, 2024, 2:49pm UTC](https://community.auth0.com/t/captcha-returns-blank/149872/4 "2024-10-29T14:49:06Z")

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