I posted the log content here before I saw your instruction to not do this, sorry for that.
I set all permissions in the ftp directory to 777, just to be sure that this is not the issue.
It still can’t find or catch files, the message from the log is always with every directory.:
WARNING: Unable to zip directory: '/mnt/webc/c3/97/53894297/htdocs/ysl/wp-admin/css/colors/blue'
Also I still can’t download the Archive or Installer.
Are there maybe other permissions to set beside the directory ones?
Thanks you
Dennis