https://docs.microsoft.com/en-us/azure/app-service/configure-ssl-certificate#private-certificate-requirements

1. In Azure portal, locate and select the RG1lod10598168 resource group.
2. Click Access control (IAM).
3. Click the Role assignments tab to view all the role assignments at this scope.
4. Click Add > Add role assignment to open the Add role assignment pane.

5. In the Role drop-down list, select the role Virtual Machine Contributor. Virtual Machine Contributor lets you manage virtual machines, but not access to them, and not the virtual network or storage account they're connected to.
6. In the Select list, select user user21059868
7. Click Save to assign the role.
Reference:
https://docs.microsoft.com/en-us/azure/role-based-access-control/role-assignments-portal
https://docs.microsoft.com/en-us/azure/role-based-access-control/built-in-roles#virtual-machine-contributor

Locking prevents other users in your organization from accidentally deleting or modifying critical resources, such as Azure subscription, resource group, or resource.
Note: In Azure, the term resource refers to an entity managed by Azure. For example, virtual machines, virtual networks, and storage accounts are all referred to as Azure resources.
1. In the Settings blade for virtual network VNET, select Locks.

2. To add a lock, select Add.

3. For Lock type select Delete lock, and click OK
Reference:
https://docs.microsoft.com/en-us/azure/azure-resource-manager/resource-group-lock-resources

The key vault needs to be in the same subscription and same region as the VM.
VM4 is in West US. KeyVault1 is the only key vault in the same region as the VM.
Reference:
https://docs.microsoft.com/en-us/azure/virtual-machines/windows/disk-encryption-key-vault