Undeploy platform failed

Unfortunately this could be due to several reasons.

But the most common at the moment is the DCOM Hardening issue, as posted by Aveva on the support website.

https://softwaresupportsp.aveva.com/SiteAssets/GCSBerlin/index.aspx#/okmimarticle/docid/ta000032813

This could cause deployment to act badly, and I have seen same errors on systems with this issue.

You should make your GR Node and Target node running the same level of windows updates. 
Now I'm assuming that your issue is when deploying/undeploying a remote node, if not, then it would be good to get some context to your issue.

You should also review your Windows Event Log on the target node, to check if you have any DCOM related errors or any other errors of interest.

Unfortunately this could be due to several reasons.

But the most common at the moment is the DCOM Hardening issue, as posted by Aveva on the support website.

https://softwaresupportsp.aveva.com/SiteAssets/GCSBerlin/index.aspx#/okmimarticle/docid/ta000032813

This could cause deployment to act badly, and I have seen same errors on systems with this issue.

You should make your GR Node and Target node running the same level of windows updates. 
Now I'm assuming that your issue is when deploying/undeploying a remote node, if not, then it would be good to get some context to your issue.

You should also review your Windows Event Log on the target node, to check if you have any DCOM related errors or any other errors of interest.