Hi,
In the portal, please navigate to your VM, Overview blade and on right side scroll down and verify that it says Security type Standard, as shown in screenshot below:
It is possible that even though you selected Standard when creating the VM it switched it back to Trusted launch without you noticing. When creating a VM, on the Review + Create tab double-check that it says Security type Standard before clicking Create button.
Please click Accept Answer and upvote if the above was useful. If you still need assistance please add a comment below.
Thanks.
-TP