Oops Something went wrong Unauthorized access When setting up Klaviyo

Topic summary

A user encountered an “Oops! Unauthorized access” error when attempting to integrate Klaviyo with their Shopify store. Despite checking Shopify admin configurations, they couldn’t identify any settings blocking the integration.

Screenshots provided: The user included images showing the error message during the Klaviyo setup process.

Responses received:

  • A moderator indicated this requires account-specific investigation and directed the user to contact Klaviyo support directly through their help center.
  • A developer suggested the issue originates from the Klaviyo app itself and recommended contacting Klaviyo. For developers experiencing similar errors, they provided troubleshooting steps: verify app.toml configuration, check environment variables in .env file, run shopify app deploy before installation, and clear local database session tables if needed.

Status: The issue remains unresolved in the forum, with the user directed to official support channels for further assistance.

Summarized with AI on October 25. AI used: claude-sonnet-4-5-20250929.

When Im setting up my Shopify Integration on klaviyo and hit update settings I get a Oops! Unauthorized access message, I cant find any shopify admin configurations that would stop me from integrating my store.

Do you know any solutions to this issue? Thanks!!

Hey, @Emiliordzq !

That does look strange. It looks like we’ll need to access your account in order to isolate any potential causes. While we’re not able to provide account-specific support via Community at this time, we’d be happy to continue assisting you through our available support channels. Please visit our help center and login for assistance.

Hey @Emiliordzq
I am working on the shopify app I have create the shopify app from the CLI with latesh version.
here key issue that was missing.
this was issue from the klaviyo app. please contact them.

as developer any one facing the error do the check.

  1. app.toml config incorrect. make sure the all config are correct.

  2. .env if need create the depend env variable code base using the api key and secrete

  3. Before installing do the `run shopify app deploy`

  4. if you still getting error delete the local database session table depend on your database.