[Trouble]can't update at some site

My bigfix server can’t update at some site by automatic and manual(using Airgap).

“BESRelay.log” and “GatherDB.log” output the following log. Please help me.
My BigFIx version is 9.5.6.

GatherDB.log
Mon, 20 Nov 2017 14:47:08 +0900 – Unexpected exception during gather of site Enterprise Security: Unexpected HTTP response: 500 Internal Error

BESRelay.log
Mon, 20 Nov 2017 10:11:20 +0900 - 2735142656 - 5: CharacterSetResult: UErrorCode=12 [U_ILLEGAL_CHAR_FOUND] in ucnv_toAlgorithmic ["\x94"]
Mon, 20 Nov 2017 10:44:25 +0900 - GatherMain (145942272) - 5: CharacterSetResult: UErrorCode=12 [U_ILLEGAL_CHAR_FOUND] in ucnv_toAlgorithmic ["\x94"]
Mon, 20 Nov 2017 10:44:26 +0900 - GatherMain (145942272) - Failed to process archive_* file: CharacterSetResult: UErrorCode=12 [U_ILLEGAL_CHAR_FOUND] in ucnv_toAlgorithmic ["\x94"]
Mon, 20 Nov 2017 11:13:26 +0900 - 3189753600 - 5: CharacterSetResult: UErrorCode=12 [U_ILLEGAL_CHAR_FOUND] in ucnv_toAlgorithmic ["\x94"]strong text

#Update:Tue, 21 Nov 2017 11:00
I could update the site of Enterprise Security.
I assume that there was a problem with the bigfix repository.
Because the site version was 2876 in this morning. At 11am, I found that the site version is 2877.
I didn’t change any setting on bigfix server and network.

GatherDB.log
Tue, 21 Nov 2017 11:14:28 +0900 – Beginning DB import of version 2877 of site Enterprise Security
Tue, 21 Nov 2017 12:03:59 +0900 – Import of version 2877 of site Enterprise Security completed successfully

BESRelay.log
no error messages

There was a report from IBM that there was a problem with this Fixlet(bessecurity:2874 or2875).
This problem was fixed on November 21st by bessecurity:2877.
Did anyone else have the same problem?