Hi,
I am using Confluence server
when i am trying to upload doc / pdf file i am getting the following error:

and in the Log file:
--------------------------
Parameters
--------------------------
pageId : 6586369
filename : myFile.docx
size : 11821
minorEdit : true
spaceKey : NN
mimeType : application/vnd.openxmlformats-officedocument.wordprocessingml.document
atl_token : 21a1d0c5cb8d6a43c67a3946b53860d7c26e5080
contentType : page
isVFMSupported : true
name : myFile.docx
caused by: javax.servlet.ServletException: Servlet execution threw an exception
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:238)
caused by: java.lang.NoClassDefFoundError: Could not initialize class com.atlassian.plugins.conversion.convert.image.ImagingConverter
at com.atlassian.confluence.plugins.conversion.impl.DefaultConversionManager.getConverters(DefaultConversionManager.java:156)
My attachment settings are:
