Cannot Activate OAuth Magento 2.4.2

[TectonicKestrel]

I have tried setting up OAuth in Magento 2.4.2 but it will not activate from System > Integrations. I get the error "Sorry, something went wrong. Please try again later." This happens every time i've tried. I have 3.0.2 installed and upgraded to 3.0.3 so i could setup OAuth as Klaviyo was not detecting my install before (and still not). I have triple checked my API details and they are correct.

[pauloharaujos]

I have the same issue here. Magento version 2.4.2-p1

[klaviyojad]

@alexsmith2709 could you confirm that your server could make outgoing calls to https://www.klaviyo.com/integration-oauth-one/magento-two/auth/confirm?c= and https://www.klaviyo.com/integration-oauth-one/magento-two/auth/handle? Otherwise could you please email us at extensions@klaviyo.com ?

[mathanagopaloxsoftwares]

@klaviyojad I am getting the same issue in our test server. When I click allow I am getting Sorry Something went wrong popup. The URL - _/admin/integration/tokensExchange/id/3/reauthorize/0/key/bd721b5136874cb42ec081a7fd4ff8b104eb6466ae15bd5d09dc5194bfe11111/?formkey=qzI7kZChJFKnjKRA&=1624334731157_ is going to 404 error.

Below is the screenshot of that error:

Version details: Magento 2.4.2 Klaviyo 3.0.5

One more thing. How to check the server could make outgoing calls to the URLs that are mentioned by you in the previous comment? Note: Our test site is not having any htaccess password of any type.

[klaviyojad]

@mathanagopaloxsoftwares we figured out the cause of this problem. It is due to a defect affecting Magento 2.4.2, it appears the next version they release will address it but in the meantime you can follow the recommendation here

[mathanagopaloxsoftwares]

@klaviyojad Thanks for the quick response. We will try the solution.