X509 Certificate preventing Helm deploys

@Oliver I see that you’re the Cert master from previous posts.
My cluster started throwing this today:

Internal error occurred: failed calling admission webhook "pilot.validation.istio.io": Post https://istio-galley.istio-system.svc:443/admitpilot?timeout=30s: x509: certificate has expired or is not yet valid 

Helm is no longer deploying and we’re in a bind. I don’t think the root certificate has expired since it has only been 99 days not 1 yr like previous posts. I’m using Istio 1.0.5. Is there a way to rectify this without downtime?