Cannot attach custom images to AWS SageMaker Studio. Results in "Update_Failed" with error message "InternalFailure".

Our SageMaker Studio service is broken in one of our AWS accounts in some deep way. Our original domain encountered this issue of "Update_Failed" when attempting to attach a new custom docker image. Using describe-domain via the CLI, we see that the "FailureReason" is just "InternalFailure". This issue also somehow effects brand new, entirely separate SageMaker Studio domains that we create. This is only an issue in our one (data science development) AWS account. Repeating the process in other accounts works as expected.