You do not have sufficient permissions to view this page

I can't enter Credentials or Consent screen via Google Console Developer

I'm admin, sometimes it's allow but most of the time it not

I don't know why. Have anyone be like this?

NOTE

I also use incognito mode , clear cache, clear data but no hope.

In top left corner there is a spinner for project selection(see the attached image), if you select some other project from the drop down of spinner the issue most probably will be solved.

You can select back your project from that menu.

It solved my problem

Please try logging out all other accounts and login only one account then you try it will work. Even I had the same issue now I'm able to do it. If that doesn't help try to login with some other account and try again.

This is most probably due to dual account access. I had to make sure that I was signed in as the same person (the button next to the minimize button on chrome browser) as the account I was using to login into the developers console to gain access. Hope this helps.

In Apis enable 'Google Play Developer API'. This error disappeared after that for me. Wierd bug

I was able to view the page but unable to create the service account.

Remedied as follows

1. First sign out of any other account.

2. Create the service account (you receive the error message)

3. Refresh the screen and the account is displayed, from the settings tab click to generate the public / private keys.

Inspect the page -> application -> cookies -> right click on the link & then clear. After clearing cookies then reload page & signin again. I hope it works.

May be the connection you are using has proxy settings, I faced the same problem , when connecting via proxy server and when i went back home and used without proxy , the page simply opened.

In case anyone has this problem: If you're using the Moesif Origin & CORS Changer chrome extension, you need to disable it. Otherwise it breaks the console

I faced the same issue, in my case, I had a chrome extension to unblock CORS, when I removed this extension from Chrome. Google started working just fine again.