Training: Instruction to develop new skills.
Hi Boris,
#1 Try to use an incognito browser/private tab and login with your credentials again (as recommend at the end)
#2 If you are trying to create a resource in a subscription that you do not have permissions to do so then I'd recommend you sign up for an Azure Free tenant and create a sandbox environment:
https://azure.microsoft.com/en-ca/free
Run Microsoft Learn training exercises in your own subscription
https://learn.microsoft.com/en-us/training/support/use-your-own-subscription
If this is helpful please accept answer.