If you are getting this error when accepting a google adwords invite then follow these steps to fix the problem; 1. Create another dummy google account, say, dummy@gmail.com 2. Sign out and sign into google adwords using your primary gmail account, say, primary@gmail.com 3. Invite dummy@gmail.com and grant an administrator role 4. Sign into your dummy@gmail.com account and accept the invite. 5. Go back to your primary@gmail.com adwords account and confirm the acceptance by dummy@gmail.com by clicking on Grant button. 6. Sign out of adowords account and sign in again using dummy@gmail.com . Delete primary@gmail.com from your adwords account. 7. Go back to your adwords invite and accept using primary@gmail.com account. This time it should go through without any errors. To summarize, you have to transfer the ownership of your current primary gmail account to an alternate (or dummy) gmail account and then delete your primary gmail id from the adwords account. H