Try to do these steps in order:

1. run the terminal as administrator and then try the command
2. If the above doesn't work, then type this command set-executionpolicy remotesigned
3. As a final resort, type this command if none of the steps work - Set-ExecutionPolicy -Scope CurrentUser -ExecutionPolicy RemoteSigned

You need to set the execution policy of your system.

Running Set-ExecutionPolicy -Scope CurrentUser Unrestricted should solve your problem. Remember to run the command in an administrative powershell

You can view your current execution policy by running Get-ExecutionPolicy –List in powershell

For more info, you can visit this