AnyCompany utilizes AWS Organizations for managing multiple AWS accounts. Upon acquiring Example Corp, the latter's AWS account was integrated into AnyCompany's management account via an Organizations invitation. The new member account was subsequently placed under an Organizational Unit (OU) specifically designated for Example Corp. A DevOps engineer at AnyCompany possesses an IAM user that assumes the role of OrganizationAccountAccessRole to access member accounts, which is configured with a policy granting full access. However, when attempting to assume this role in Example Corp's new member account through the AWS Management Console, the engineer encounters an error message stating, "Invalid information in one or more fields. Check your information or contact your administrator." What corrective action should be taken to enable the DevOps engineer to access Example Corp's new member account?