Cosmetic (?) Error in Core Tools when proxies.json is configured

Using Core Tools `3.0.2931`

When configuring a simple proxies.json:
```json
{
"$schema": "http://json.schemastore.org/proxies",
"proxies": {
"AzureRetailPrices": {
"matchCondition": {
"methods": [
"GET"
],
"route": "/api/prices"
},
"backendUri": "https://prices.azure.com/api/retail/prices"
}
}
}
```

I get the below error from the Powershell Worker, however the proxy continues to work fine.

```
[2020-11-03T17:37:38.857] Worker failed to function id 2bec701c-a38e-472e-bcb1-5211e957aae6.
[2020-11-03T17:37:38.861] Result: Failure
Exception: The script file '' has parsing errors:
The file could not be read: Cannot process argument because the value of argument "path" is not valid. Change the
value of the "path" argument and run the operation again..
[2020-11-03T17:37:38.865]
Stack: at Microsoft.Azure.Functions.PowerShellWorker.AzFunctionInfo.GetParameters(String scriptFile, String entryPoint, ScriptBlockAst& scriptAst) in D:\a\1\s\src\FunctionInfo.cs:line 186
[2020-11-03T17:37:38.866] at Microsoft.Azure.Functions.PowerShellWorker.AzFunctionInfo..ctor(RpcFunctionMetadata metadata) in D:\a\1\s\src\FunctionInfo.cs:line 73
[2020-11-03T17:37:38.867] at Microsoft.Azure.Functions.PowerShellWorker.FunctionLoader.LoadFunction(FunctionLoadRequest request) in D:\a\1\s\src\FunctionLoader.cs:line 52
[2020-11-03T17:37:38.868] at Microsoft.Azure.Functions.PowerShellWorker.RequestProcessor.ProcessFunctionLoadRequest(StreamingMessage request) in D:\a\1\s\src\RequestProcessor.cs:line 226.
```