'invalid_request error on AWS Cognito Custom UI Page
when going to the custom AWS Cognito UI Page:
https://<your_domain>/login?response_type=code&client_id=<your_app_client_id>
am getting the following error:
An error was encountered with the requested page.
View error
invalid_request
Solution 1:[1]
O-Auth options need to be check as shown in the following picture
Solution 2:[2]
You need the following in the App client Settings of your user pool:
- Enable
Cognito User Poolas "Identity Provider". - Allowed "OAuth Scopes" should have
openidenabled.
Solution 3:[3]
In my case, it appears there was some issue with verifying the phone number. So switched back to email.
This document is good for checking everything.
Solution 4:[4]
TLDR: If you use an AWS User Pool with Cognito App Client and have an Application Load Balancer that is exposed via a custom DNS entry (e.g. custom-domain.com, which has to be secured via SSL), use this custom domain for the Cognito App Client's callback URL (i.e. https://custom-domain.com/oauth2/idpresponse) instead if the random DNS name created by AWS.
I had the same error and this issue solved it for me. I used a User Pool with a Cognito App Client and as callback URL I first used the DNS name that AWS created for it (<load balancer name>-<random number>.<region>.elb.amazonaws.com, i.e. "callbackUrl": "https://<load balancer name>-<random number>.<region>.elb.amazonaws.com/oauth2/idpresponse). I also created a DNS record for a custom domain to expose the load balancer to the internet and secured it via SSL. As a result, the certificate was not valid for the URL created by AWS, but only my custom domain. The Cognito App Client was thus trying to access the URL with the invalid SSL certificate and returned the error.
Sources
This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.
Source: Stack Overflow
| Solution | Source |
|---|---|
| Solution 1 | Neil |
| Solution 2 | xtra |
| Solution 3 | |
| Solution 4 | faemmi |



