When attempting to apply a policy to a Symantec Critical System Protection (SCSP) Windows Agent, a "Unknown Policy Error" is thrown.
"Unknown Policy Error" in SCSP console.
Enabling Trace Debugging (sisipsconfig -trace) from the command line offers more detail on the error. Specifically, "Error running Translator 128" is shown in the Trace Debug logs in the \Agent\scsplog\SISIPSService.log
The "128" refers to a Windows error.
In another case, the error "-1073741502" was seen in the trace debug logs. This translates to 0xC0000142 = 'DLL Initialization failed', which is another symptom of Desktop Heap Space running low.