Vertex AI - cannot create managed notebook instance

Question

I'm following all the (easy) steps in the documentation, but I'm stuck at clicking the "CREATE" button. When I click it, the process runs for a few seconds, then the button re-appears, like I never clicked it.

If I go back to the "Managed Notebooks" page, no instance is present.

Am I missing something basic? Has someone the same problem as mine?

Answer 1

Don't know what it was, but today the issue seems resolved!