The AWSSQLServer-DBCC not working

Hi team,

i have configured the AWSSQLSERVER-DBCC automation on EC2 instance for SQL server 2019 and in automation 3rd step completed i.e. DBCC command completed but last step keep running and looks that command(InstallPowerShellOnLinux) will run on linux machine only but my machine is Windows 2019 OS. can some one helps me for understanding about this step.

Error: A positional parameter cannot be found that accepts argument \u0027$null\u0027