IAM role ARN value is invalid or does not include the required permissions for: AWS_ROLE_INTEGRATION ???

YMMV, but the problem for me was that the "aws:SourceArn" condition on my role's trust policy was set to the wrong ARN. Setting it to the ARN of the resource that needed to assume the role fixed it.

Did the role you create have the required policy as described in the following links?

https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/AuroraMySQL.Integrating.Authorizing.IAM.S3CreatePolicy.html

https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/AuroraMySQL.Integrating.Authorizing.IAM.LambdaCreatePolicy.html

https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/AuroraMySQL.Integrating.Authorizing.IAM.CWCreatePolicy.html

https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/AuroraMySQL.Integrating.Authorizing.IAM.KMSCreatePolicy.html

These might also help: https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/AuroraMySQL.Integrating.Authorizing.IAM.CreateRole.html https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/AuroraMySQL.Integrating.Authorizing.IAM.AddRoleToDBCluster.html

In case anyone else runs across this, if you're using IaC, I found this can also be caused by attempting to associate the role before the permissions are attached. In Terraform, this was fixed by adding a depends_on meta-argument to the resource/role association.