Double-check your dielectric thickness. The new 2022 material library includes Panasonic Megtron 6 by default—no more manual typing.
If you are under maintenance, check the Cadence Support Portal for the download. The "Analysis Sigrity 2022.1 Hotfix" is already available as of last week. Cadence Design Systems Analysis Sigrity 2022 Fr...
Look for the Thermal Map . If you see red over your BGA, add more vias. Double-check your dielectric thickness