Client side extension could not apply errors

Hi,

I have my default domain policy and I have modified this to add a drive mapping. On some servers, this modification works fine. On other servers, this modification does not work. I get the following errors:

the client side extension could not apply computer policy settings for default domain policy because it failed with error code the system cannot find the file specified

There are some numbers surrounded by percentages but ommited this.

The RPC services are running, I am logged in with a domain account. What is missing?

Thanks