Issue with version greater 2.56

Hello People,

i am running Calibre Server 2.56 on a Windows 2012 R2 Core Server.

With newer version greater 2.56, i get following message below.

Somebody else with this setup have simular problems?

PS C:\Program Files\Calibre2> .\calibre-server.exe
Python function terminated unexpectedly
cannot import name QImage (Error Code: 1)
Traceback (most recent call last):
File "site.py", line 132, in main
File "site.py", line 108, in run_entry_point
File "site.py", line 50, in load_module
File "site-packages\calibre\library\server\main.py", line 12, in <module>
File "site.py", line 50, in load_module
File "site-packages\calibre\library\server\base.py", line 21, in <module>
File "site.py", line 50, in load_module
File "site-packages\calibre\library\server\content.py", line 14, in <module>
File "site.py", line 50, in load_module
File "site-packages\calibre\utils\img.py", line 10, in <module>
ImportError: cannot import name QImage