Ok found a solution.
We had to use the the following Plesk Application.
C:\Program Files\SWsoft\Plesk\admin\bin\SkelMng.exe
Command line:
C:\Program Files\SWsoft\Plesk\admin\bin>SkelMng
Skelmng (Skeletons Manager) Utility
Usage:
SkelMngApp --list-formats
SkelMngApp --test-support <type>
SkelMngApp --test-archive --filename <filename> [ --force-type <type> ]
SkelMngApp --remove-skel --id <client_id>
SkelMngApp --install-default --id <client_id>
SkelMngApp --install-skel --filename <filename> [ --force-type <type> ] --id <client_id>
SkelMngApp --setup-skel --vhost-name <domain_name> --id <client_id>
Archive type detection performed by analisys of its filename extension.
Also you may specify it manualy via <type> parameter of --force-type option
(possible values: 'zip', 'tgz').
0
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First we did the following command:
C:\Program Files\SWsoft\Plesk\admin\bin>SkelMng --list-formats
GZ
RAR
TAR
TGZ
ZIP
0
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Secondly we did the following command:
C:\Program Files\SWsoft\Plesk\admin\bin>SkelMng --test-support
and got "Unexpected error"
This one we dont get!
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and the last step we did:
C:\Program Files\SWsoft\Plesk\admin\bin>SkelMng --install-default
0
Ha! now we got the .skel\0 folder setup as default. For us this is good.
Retried setup physical hosting. WORKS!
What happenned during upgrade is totaly unknown to us at the moment had to find a solution fast.
Have a nice day!