You can ignore that warning, it only appears on the <Linking> apk to tell you to switch back to the official version. Since you have already signed-in successfully (your ID is on the screen's top right), then patch <Mod> apk over <Linking> apk, turn on permissions and you are good to go.
(If anybody has problem signing in due to that suspension warning, just hit ok and continue the sign-in process. The warning doesn't pop up if you do not hit anywhere else on the screen to trigger the game loading, signing-in is fine.)
Do not mod guild quest, don't risk it esp main accounts....