[19-Oct-2016 15:19:23 Europe/Prague] PHP Fatal error: Uncaught exception 'Google_Auth_Exception' with message 'Error refreshing the OAuth2 token, message: '{ "error" : "invalid_grant" }'' in /hosting/www/sportujsnami.cz/www/core/components/analytics/model/google-api-php-client/src/Google/Auth/OAuth2.php:346 Stack trace: #0 /hosting/www/sportujsnami.cz/www/core/components/analytics/model/google-api-php-client/src/Google/Auth/OAuth2.php(270): Google_Auth_OAuth2->refreshTokenRequest(Array) #1 /hosting/www/sportujsnami.cz/www/core/components/analytics/model/google-api-php-client/src/Google/Client.php(412): Google_Auth_OAuth2->refreshToken('1/8v2qi386B2udI...') #2 /hosting/www/sportujsnami.cz/www/core/components/analytics/elements/widget/widget.analytics.php(120): Google_Client->refreshToken('1/8v2qi386B2udI...') #3 /hosting/www/sportujsnami.cz/www/core/model/modx/moddashboardwidget.class.php(72): include_once('/hosting/www/sp...') #4 /hosting/www/sportujsnami.cz/www/core/model/modx/moddashboard.class.php(78): modDashboardWidget->getContent(Object(WelcomeManagerCon in /hosting/www/sportujsnami.cz/www/core/components/analytics/model/google-api-php-client/src/Google/Auth/OAuth2.php on line 346
This question has been answered by kudykam. See the first response.
I deleted record in database modx_dashboard_widget with google anylitics and now I can login.