Error:
*** Error importing database:Could not read schema model header information from package. The model version '3.6' is not supported.
Work Around:
You need to Download and install the latest Data Tier Application framework (18.2) (Link:https://www.microsoft.com/en-us/download/confirmation.aspx?id=58207) and run the SQLPACKAGE.exe located in C:\Program Files\Microsoft SQL Server\150\DAC\bin
Open CMD run as admin:
The command would look like below.
CD "C:\Program Files\Microsoft SQL Server\150\DAC\bin"
SqlPackage.exe /a:import /sf:"C:\temp\uatbackup.bacpac" /tsn:localhost /tdn:AxDBFromUAT /p:CommandTimeout=1200
and Bingo! It worked!