cant create/add new Virtual Machine on Azure Portal error on resources

I am receiving this error from the Virtual Machine page creation

"{"code":"InvalidTemplateDeployment","message":"The template deployment failed with error: 'The resource with id: '/subscriptions/32cc2407-71f3-4d35-9c3b-d3a2573f18ec/resourceGroups/clt/providers/Microsoft.Compute/virtualMachines/testvm' failed validation with message: 'The requested size for resource '/subscriptions/32cc2407-71f3-4d35-9c3b-d3a2573f18ec/resourceGroups/clt/providers/Microsoft.Compute/virtualMachines/testvm' is currently not available in location 'southeastasia' zones '' for subscription '32cc2407-71f3-4d35-9c3b-d3a2573f18ec'. Please try another size or deploy to a different location or zones. See https://aka.ms/azureskunotavailable for details.'.'."}"

I would accept any help that anyone can suggest

The error message has told you exactly the problem you’re experiencing.

You will need to update your template to specify a size that is available in the region you have chosen.

Using the Azure cli you can run the following:

az vm list-sizes --location "southeastasia"

This will list the VM sizes available in the location you specify.

See https://docs.microsoft.com/en-us/cli/azure/vm?view=azure-cli-latest#az-vm-list-sizes for specifics.