From 09813ad8dc7960d576facc60462b0e563c045c95 Mon Sep 17 00:00:00 2001
From: M66B <M66B@users.noreply.github.com>
Date: Sun, 10 Oct 2021 18:45:39 +0200
Subject: [PATCH] Updated FAQ

---
 FAQ.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/FAQ.md b/FAQ.md
index 78ca127fbc..9a5260fc3a 100644
--- a/FAQ.md
+++ b/FAQ.md
@@ -572,6 +572,10 @@ After enabling two factor authentication there will be this error message:
 
 *[ALERT] Application-specific password required: https://support.google.com/mail/accounts/answer/185833 (Failure)*
 
+The error message "*Authentication failed - Invalid credentials*" means that the Android account manager was not able to refresh the access token.
+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.
+You can workaround this issue by using an app password.
+
 <br />
 
 *App specific password*