CC issues with Radeon V520 on AWS G4ad --HELP

Hello All

We are having issues with CC recognizing the radeon GPU on the AWS G4an.

The puzzling thing is CC settings gives a GPU benchmark using vulcan without issue but the CC engine complains and refuses to start.

It reports Vulkan compatible device and reports the benchmark ok.

What is issue?

Further information: using an AWS EC2 g4ad.4xlarge instance (16-core / 32-thread of AMD Epyc CPU, 64 GB RAM, AMD Radeon Pro v520 GPU), using Radeon drivers provided by AWS: docs.aws.amazon.com/.../install-amd-driver.html