Does not work.

When uploading into Service Centre on platform 11.9.2, I get compiler error "Source Code Expected: The Extension has no .NET source code to update."

When trying to use the action in Service Studio, I get compiler error Internal Error

Compilation Error.
referencesProxy\Extension_DateMillisecondsCalc_proxy.cs(29,29): error CS0234: The type or namespace name 'NssDateMillisecondsCalc' does not exist in the namespace 'OutSystems' (are you missing an assembly reference?)
protected static OutSystems.NssDateMillisecondsCalc.IssDateMillisecondsCalc issDateMillisecondsCalc =(OutSystems.NssDateMillisecondsCalc.IssDateMillisecondsCalc)ServiceLocator.GetService<OutSystems.NssDateMillisecondsCalc.CssDateMillisecondsCalc>();

State: Build References Proxy