Trellix Agent Extension (5.7.9 RTW) Extension failed to install now can't manage any tasks

[gwgunster]

How do I resolve ? (Official support port is not working.. so posting here.)

Here is the message:

Started: Check In Components
3/31/23 11:12:18 PM Downloading the following component:
3/31/23 11:12:18 PM Trellix Agent Extension (5.7.9 RTW) (type EXTENSION) - file name=EPOAGENTMETA_33441.zip
3/31/23 11:12:18 PM Downloading file E:\PROGRA~1\McAfee\EPOLIC~1\DB\SoftwareManager\3967\5.7\EPOAGENTMETA_33441.zip.
3/31/23 11:12:19 PM Successfully downloaded file E:\PROGRA~1\McAfee\EPOLIC~1\DB\SoftwareManager\3967\5.7\EPOAGENTMETA_33441.zip.
3/31/23 11:12:19 PM Checking in extension 'Trellix Agent Extension (5.7.9 RTW)'.
3/31/23 11:12:25 PM Command Failed: The following error occurred while executing this line: E:\Program Files\McAfee\ePolicy Orchestrator\Server\extensions\installed\EPOAGENTMETA\5.7.9.101\install.xml:245: The following error occurred while executing this line: E:\Program Files\McAfee\ePolicy Orchestrator\Server\extensions\installed\EPOAGENTMETA\5.7.9.101\install.xml:58: java.lang.NoSuchMethodError: com.mcafee.epo.policy.services.PolicyObjectService.savePolicyObject(Ljava/sql/Connection;Lcom/mcafee/orion/core/auth/OrionUser;Lcom/mcafee/epo/policy/model/PolicyObject;ZZZ)V.
3/31/23 11:12:25 PM Failed to check in extension 'Trellix Agent Extension (5.7.9 RTW)'.
3/31/23 11:12:25 PM Completed: Check In Components (The component(s) failed to check in.)

Any help would greatly be appreciated, thank you all.

[savidudu]

Hello,

I also faced the same issue and posted here for assistance :

https://communitym.trellix.com/t5/ePolicy-Orchestrator-ePO/Agent-Extension-5-7-9-check-in/m-p/711753 

What is your ePO version ?

Have you tried downloading the package and check-in manually in Extension page.

Thanks

[cdinet]

Check this KB to see if all the versions match - maybe it got partially installed.  I would also highly suggest opening a ticket please.

https://kcm.trellix.com/corporate/index?page=content&id=KB70963

[ktech]

I'm having this same issue.  Did you ever get this working?

[cdinet]

What errors are you seeing?

[Pikapp691]

Receiving the same error when trying to install extension manually. Any update on this issue?

[cdinet]

@Pikapp691 I would recommend opening a ticket.  There could be different reasons for the failure and we would need to see logs and possibly get sql information.