<p>Note that an app specific password is required when two factor authentication is enabled. After enabling two factor authentication there will be this error message:</p>
<p>Note that an app specific password is required when two factor authentication is enabled. After enabling two factor authentication there will be this error message:</p>
<p>The error message “<em>Authentication failed - Invalid credentials</em>” or <em>Token refresh required</em> means that the Android account manager was not able to refresh the access token, or that getting an access token was not allowed, for example when the account is a <ahref="https://support.google.com/families/answer/7101025">Family Link</a> account, in which case you can use the Gmail app only. A common cause for this problem is using a VPN, a firewall app or an ad blocker which blocks internet access for the Android account manager. Please make sure permissions were granted to the app via setup step 2. You can try to workaround this issue by using the quick setup wizard <em>Gmail (Oauth)</em> or by using an app password.</p>
<p>The error message “<em>Authentication failed - Invalid credentials</em>” or <em>Token refresh required</em> means that the Android account manager was not able to refresh the access token, or that getting an access token was not allowed, for example when the account is a <ahref="https://support.google.com/families/answer/7101025">Family Link</a> account, in which case you can use the Gmail app only. A common cause for this problem is using a VPN, a firewall app or an ad blocker which blocks internet access for the Android account manager. Please make sure permissions were granted to the app via setup step 2. You can try to workaround this issue by using the quick setup wizard <em>Gmail (Oauth)</em> or by using an app password.</p>
<p><em>[ALERT] IMAP access is not allowed for this account.</em></p>
<p>This means that it is a <ahref="https://families.google.com/familylink/">Google Family Link</a> account for a child under the age of 13. Please see <ahref="https://www.reddit.com/r/ios/comments/x0dklz/i_give_up_adding_google_email_account_to_my/">here</a> for a solution.</p>