The error 0x80131515 (Operation is not supported) almost always means Windows is blocking the file because it was downloaded from the internet. Even if you unzip the ADModule, every DLL and PS1 file still carries a Mark-of-the-Web (Zone.Identifier) that PowerShell respects.
Loads the DLL into the .NET runtime, bypassing all the usual file‑load security checks (like the “Mark of the Web” or untrusted zone).