Bilk File Upload

i am using Content Service for bulk file upload
i have to use upload method to fetch the 'ContentOutputStream' for file uploading to Knowledge Center
and the upload method is called as
ContentOutputStream outStream = cs.upload(doc, arg1);
//here cs is instance of ContentService

which is created as

ContentService cs = ServiceLocator.getContentService(sc);
//here sc is ServiceContext which is created as

ServiceContext sc = ServiceLocator.getAdministratorServiceContext();

//* these lines of codes are provided #forum.appian.com/.../


But i am getting an error as "Could not initialize class com.appiancorp.suiteapi.common.ServiceLocator"

can some1 help

//log file attached

OriginalPostID-238850

log.txt