medium severityVertex AI Agent Builder (GCP Console UI)
Error toast when clicking Preview/Integration tabs: "There was an error while loading /gen-app-builder/locations/global/engines/[ID]/configurations?project=[ID]. Please try again. It may be a browser or network issue." Configurations fail to load/persist visibility in UI.
Root cause
Likely backend API failure loading configurations (/gen-app-builder/.../configurations endpoint), possibly transient service issue, permissions, or regional rollout problem. No confirmed technical root cause documented.
Vertex AI Agent Builderconfiguration loadingPreview tabIntegration tabgen-app-builderUI error