Please verify vpc connections as well as we have minimum requirement of 2 subnets .
Looking at my VPC connection setup (inside quicksight), I can see EXECUTION ROLE is empty but i don’t remember if it had a value before.
If I try to setup an execution role, the only option I have is “aws-quickisght-service-role-v0” but SAVE button stay disabled.
The documentation provides details on how to setup. Execution role is required.