tion/>Sidecar Injection Problems</a></li><li role=none><a role=treeitem title="Describes how to resolve configuration validation problems." href=/v1.19/docs/ops/common-problems/validation/>Configuration Validation Problems</a></li><li role=none><a role=treeitem title="Resolve common problems with Istio upgrades." href=/v1.19/docs/ops/common-problems/upgrade-issues/>Upgrade Problems</a></li></ul></li><li role=treeitem aria-label="Diagnostic Tools"><button aria-hidden=true tabindex=-1></button><a title="Tools