Fix WeightedClusterValidationError

✅ Solution

The "WeightedClusterValidationError" in Istio usually occurs due to incorrect or missing weight definitions in VirtualService configurations, specifically when routing traffic to multiple destination services. To fix this, carefully examine your VirtualService's `http.route.weight` specifications, ensuring that all weights are non-negative integers, and that the sum of weights for a given route matches your intended traffic distribution; invalid weights or missing weights for some routes will trigger this error.