Cannot create a Always Free Compute Instance in my Free Tier Account

I have a Free Tier Account and was trying to Create an Always Free compute instance and getting an error that I have reached Quota. I don't have any compute instances running in my tenancy. When trying to Create a compute instance I see some monthly cost for Boot Volume. Is that causing the instance creation error. Does this mean we are not allowed to create free compute instance at all until we upgrade to a paid account?