Description of problem: At regular intervals the pop up window (In attachment). I must confirm it.
Created attachment 800967 [details] Popup window
Looks like we fail to get a valid token, let's see whether we can find out why. Run kdebugdialog and enable "LibKGAPI" option, then restart Akonadi (akonadictl restart) and wait until the dialog appears again. Then please grep ~/.xsession-errors for "akonadi_google" and upload it here (remember to sanitize any personal data, especially your email address).
It seems that the error no longer occurs.