Where can I fix this css code bug for checkout page? (Dawn theme)

Topic summary

A user encounters a CSS bug on their checkout page using the Dawn theme and cannot locate the relevant CSS file to fix it. Screenshots show specific CSS class names (_1qy6ue67, _1qy6ue68) that don’t appear in standard theme files like theme.css or style.scss.liquid.

Key troubleshooting steps suggested:

  • Check backend settings and theme files
  • Verify if using Shopify Plus (user is not)
  • Investigate custom apps that might affect checkout styling

Current situation:
Shopify is limiting checkout CSS access while rolling out new styling methods. The user is running Appstle subscription app for payment plans, which may be causing the issue.

Recommended next steps:

  • Contact Shopify support or the app developer
  • Review whether Appstle has checkout styling features that could be interfering

The discussion remains open with no definitive solution yet identified.

Summarized with AI on November 19. AI used: claude-sonnet-4-5-20250929.

Hi community,

seems like the checkout page has some CSS bug. Where can I fix this code? Just need to adjust 1 of this CSS line code. But unfortunately, I cannot find any CSS file that contains this CSS class.

Hi,

Have you checked “theme.css” or “style.scss.liquid” ?

I checked it. There is neither “theme.css” nor “style.scss.liquid” file. And no files have this css class name “._1qy6ue67, ._1qy6ue68”

Are you using Shopify plus?

No, I am not. But this is a bug that any users shouldn’t have, right? It’s on checkout page.

Need to check your backend then, if you want we will check your backend you can contact us (details given in signature)

Hey there, are you using custom apps? Right now shopify is limiting access to the checkout css code because they are rolling out a new way to style this page. So your best bet is actual shopify support, or an app developer if you are using an app.

Are you using an app that has access to checkout styles or features?

Hi Bailey, I am using appstle subscription app for the payment plans. Do you think this caused the bug?