I have created a total of 30 projects in the Google Developers Console, including 23 between 12/23 and 12/27. Most recently, 3 projects were created on 12/27. When I tried t
So I did ran in to this a few months ago. At that time I did not see a solution. Though when I tried again today that error notice have been updated with a link to a form where you can request a increase of the project quota for your account. This is likely a ongoing roll out at the moment (I don't get this in all my accounts).
Reference it looks like this:
You may not see this updated message yet. Any how, the form link is https://support.google.com/code/contact/project_quota_increase. After filling in the form support got in touch pretty much within a day and my quota is now raised.