Create Centos image on Azure

enter image description herei been trying to create a CentOS image in azure using uploaded CentOS vhd. However, it shows me that "This resource was not found, it may have been deleted." when i tried to create it.

i followed the procedure mentioned in https://docs.microsoft.com/en-us/azure/virtual-machines/linux/create-upload-centos and the vhd was uploaded successfully to the storage blob. May i know what is the problem causing this?

My file was already a vhd format and i am uncertain why this would show up. enter image description here