Couldn't retrieve verification key from your identity provider

I have created an OIDC provider in IAM.

The url is: idgatewayawsstage.flqa.net/
The configuration is accessible at: https://idgatewayawsstage.flqa.net/.well-known/openid-configuration
From there you can get the jwks_uri and go here: https://idgatewayawsstage.flqa.net/.well-known/jwks

The "iss" in the claims is: "https://idgatewayawsstage.flqa.net/" and is apparently matched. I can change the url value in the provider and get the "No OpenIDConnect provider found" error.

Upon attempting an action via the api passing a valid JWT in the WebIdentityCredentials with the roleArn that trusts the OIDC provider I receive the error: Couldn't retrieve verification key from your identity provider, please reference AssumeRoleWithWebIdentity documentation for requirements

Can anyone explain why I am receiving this error? I have reviewed the suggested documentation and have not come across any help.