Doing practice on kodekloud Playgrounds

Hi everyone!
I am doing the first section in “devsecops” course. I am trying to create a vm with the help of parameters and template file. I have not create my azure account, rather I am using playground labs. I am getting this error.
Resource devsecops-cloud_Datadisk_0 was disallowed by policy. Any help would be appreciated.
Regards