Upgrade BigFix Agent From 10.0.8 to 11.0.1 Issues

Hello

Last week we upgraded a our BigFix agents from 10.0.8 to 11.0.1 and now approximately 50 percent are not reporting in. Looking in the filldb log is is filled with errors such as the one below. Other than upgrading the client there were no other changes. Not sure what might be going on any ideas would be appreciated

Wed, 08 May 2024 08:16:47 -0400 – 8584 – Encountered at least one error while processing archive file D:\Program Files (x86)\BigFix Enterprise\BES Server\FillDBData\bufferdir\00000000000550cd in buffer; the archive was processed, but at least one part of it was discarded.
Wed, 08 May 2024 08:16:48 -0400 – 8580 – Unable to parse chunk of compressed file in buffer; discarding chunk. (Client report signing certificate computer ID didn’t match computer ID of report. Discarding message from computer 1080682050)
Wed, 08 May 2024 08:16:48 -0400 – 8580 – Encountered at least one error while processing archive file D:\Program Files (x86)\BigFix Enterprise\BES Server\FillDBData\bufferdir\00000000000550d3 in buffer; the archive was processed, but at least one part of it was discarded.
Wed, 08 May 2024 08:17:17 -0400 – 8584 – Unable to parse chunk of compressed file in buffer; discarding chunk. (Client report signing certificate computer ID didn’t match computer ID of report. Discarding message from computer 1619918494)
Wed, 08 May 2024 08:17:17 -0400 – 8584 – Encountered at least one error while processing archive file D:\Program Files (x86)\BigFix Enterprise\BES Server\FillDBData\bufferdir\000000000005517d in buffer; the archive was processed, but at least one part of it was discarded.

I think that is going to be difficult to troubleshoot here - do you have a support ticket open on it?

I have opened a support case.