Hi,
Azure for Students restricts which regions you can deploy resources to. Typically you are restricted to five different regions, and these vary for each person.
Please navigate to Azure Policy -- Authoring -- Assignments using link below:
https://portal.azure.com/#view/Microsoft_Azure_Policy/PolicyMenuBlade/~/Assignments
Look for an assignment similar to "Allowed locations", or something with location as part of the name. Click on this assignment, and then examine the Parameter value for list of regions.
These are the regions you are allowed to deploy resources to. Please try to create the container registry in one of these regions and let me know the results.
Please click Accept Answer and upvote if the above was helpful.
Thanks.
-TP