Yesterday, I've discovered that KMail (5.7.3) on my Kubuntu 18.04 doesn't synchronize with Google mail inbox. I tried to re-create the gmail account, but after logging into Google I received the following message:
Sign in with Google temporarily disabled for this app
This app has not been verified yet by Google in order to use Google Sign In.
Is that global problem that KMail stopped working with Google or just mine? Is it possible to solve/workaround it? Maybe it's possible to bypass KMail wizard and log into Google account using an app password?