Everything seems to be okay now.
But for me there was an additional problem with the webserver delivering just a blank page,. Obviously it was caused by a defunct Wordpress-Plugin – WP-Statistics (I got a warning by Jetpack some hours ago about this issue).
But for me there was an additional problem with the webserver delivering just a blank page,. Obviously it was caused by a defunct Wordpress-Plugin – WP-Statistics (I got a warning by Jetpack some hours ago about this issue).