3461619 - File cannot be downloaded from SAP Content Server if the file name contains the word "expiration"

You have a file containing the word "expiration" in the file name. This file can be uploaded successfully via KPRO to SAP Content Server, but it cannot be downloaded later on.

In application log(transaction SLG1), the following error is logged:

MANDT      100
STOR_CAT   ****
PATH       C:\Users\***\AppData\Local\SAP\SAP GUI\tmp\
FRONTEND   X
COMP_NAMES * expiration *.pdf
COMP_NAMES * expiration *.pdf
ERRMSG     HTTP error: 401 Authorization Required  SsfVerify failed: rc=5, there are s
ERRMSG     igner errors,signer rc=27, certificate not found
V1         SCMS_DOC_READ_FILES
V2                                                        14
V3         ****
V4         ******** 

SAP Content Server 6.5

SAP Content Server, 6.5, expiration, file name, 401 Authorization Required, SsfVerify failed, rc=5, rc=27, there are signer errors, certificate not found , KBA , BC-SRV-KPR-CS , SAP Content Server , Problem